Buy Sambar Onion Small Onion Desi Seeds Online in India

Grow fresh and flavourful small onions at home with SeedVanam Sambar Onion Desi Seeds. Commonly known as Small Onion, Sambar Onion, Madras Onion or Shallot, this popular kitchen vegetable is widely used in South Indian cooking for its distinctive aroma, firm texture and rich flavour.

Sambar onions are smaller than regular bulb onions and are commonly added whole or sliced into sambar, curries, gravies, chutneys, pickles, kuzhambu and traditional vegetable dishes. Their compact size makes them convenient for cooking and suitable for gardeners who want to grow onions in limited spaces.

SeedVanam Sambar Onion Desi Seeds can be raised in seedling trays and later transplanted into pots, grow bags, raised beds or open garden soil. The plants develop slender green leaves followed by small bulbs near the soil surface. Under suitable growing conditions, the bulbs develop firm layers and an attractive reddish, pinkish or light-brown outer skin, depending on the seed variety and maturity.

Small onions require patience during germination and early seedling growth. Once healthy seedlings become established, they can be maintained with sufficient sunlight, fertile soil, regular watering and proper plant spacing.

These seeds are suitable for home gardeners, terrace gardeners and small growers looking to cultivate a traditional onion type for regular household use.

Why Grow Sambar Onion?

• Popular small onion variety for Indian cooking
• Suitable for sambar, curries, gravies and pickles
• Can be grown in pots and grow bags
• Ideal for kitchen and terrace gardens
• Suitable for raised vegetable beds
• Compact bulbs require limited growing space
• Open-pollinated and non-hybrid seed type
• Suitable for beginner and experienced gardeners
• Can be started in nursery trays
• Produces edible green leaves and bulbs
• Suitable for home use and small-scale cultivation
• Can be harvested as tender onions or mature bulbs
• Provides the satisfaction of growing traditional vegetables at home
• Suitable for different Indian growing regions when sown in the correct season
• Easy to include in an existing vegetable garden

Product Information

Common Name: Sambar Onion
Other Names: Small Onion, Madras Onion, Shallot, Chinna Ullipaya, Chinna Vengayam
Botanical Name: Allium cepa
Botanical Group: Commonly associated with the Aggregatum Group
Plant Family: Amaryllidaceae
Crop Type: Bulb vegetable
Seed Type: Desi, non-hybrid and open-pollinated
Seed Quantity: Approximately 40 seeds per packet
Bulb Size: Small
Bulb Colour: Reddish, pinkish or light brown, depending on the variety and growing conditions
Primary Use: Culinary use
Preferred Growing Method: Nursery sowing followed by transplantation
Approximate Germination Time: 7–14 days
Approximate Transplanting Time: 35–50 days after sowing
Approximate Harvesting Time: 90–130 days from sowing, depending on variety and season
Preferred Position: Full sunlight
Sunlight Requirement: Approximately six to eight hours daily
Preferred Soil: Loose, fertile and well-drained soil
Water Requirement: Regular and moderate
Suitable For: Pots, grow bags, raised beds, kitchen gardens and farms
Growing Difficulty: Moderate

Germination, bulb colour, bulb size, maturity and total harvest can vary according to seed quality, variety, local climate, sowing season, soil, sunlight, spacing, irrigation and plant care.

What Is Sambar Onion?

Sambar Onion is a general market name used for small onions commonly added to South Indian recipes. These onions are valued for their stronger aroma, compact size and distinctive flavour.

They are also frequently referred to as Madras onions or shallots. However, the exact botanical group and growth habit can differ between seed varieties.

Traditional small onion types may form several bulbs around the base when grown from bulbs. Seed-grown small onion varieties may develop individual or grouped bulbs depending on their genetics and local growing conditions.

For this reason, SeedVanam should avoid guaranteeing a specific number of bulbs per plant unless the supplier has provided confirmed varietal information.

Sambar Onion Plant Characteristics

Sambar Onion plants initially develop thin, hollow and upright green leaves. As the plants become established, the lower portion begins to swell and form bulbs near the soil surface.

Healthy plants generally display:

• Upright green leaves
• Strong plant bases
• Steady leaf production
• Gradual swelling near the lower stem
• Small and firm bulbs
• Dry outer skin near maturity
• Natural bending or drying of leaves before harvest

The bulbs are generally smaller than common table onions. Their exact size depends on variety, plant spacing, soil fertility and growing conditions.

Plants grown too closely may produce smaller bulbs. Plants receiving insufficient sunlight may remain weak and fail to develop properly.

Culinary Uses of Sambar Onion

Small onions are widely used in Indian home cooking. Their compact size allows them to be peeled and added whole to several dishes.

Common culinary uses include:

• Vegetable sambar
• Drumstick sambar
• Brinjal sambar
• Onion sambar
• Puli kuzhambu
• Kara kuzhambu
• South Indian curries
• Vegetable gravies
• Tamarind-based dishes
• Onion chutney
• Tomato and onion chutney
• Coconut chutney variations
• Pickled small onions
• Onion thokku
• Rasam preparations
• Stir-fried vegetables
• Lentil dishes
• Biryani
• Pulao
• Homemade masala bases
• Soups and stews
• Salads
• Sandwiches and wraps

Tender green tops may also be used in cooking. However, removing too many leaves from plants intended for bulb production can reduce the energy available for bulb development.

Best Sowing Season in India

The ideal sowing season for Sambar Onion depends on region, rainfall, temperature and the suitability of the supplied seed variety.

Onion plants respond to seasonal temperature and natural day length. Therefore, the same sowing month may not be suitable for every part of India.

Telangana and Andhra Pradesh

In Telangana and Andhra Pradesh, practical nursery-sowing windows may include:

• May to June for selected monsoon crops
• September to November for winter or rabi cultivation
• January to February for selected warm-season crops

Heavy continuous rainfall should be avoided during nursery establishment.

For home gardens in Hyderabad, post-monsoon sowing from September to November generally offers more manageable temperatures for germination and seedling growth.

Tamil Nadu

Small onions are widely cultivated in Tamil Nadu.

Depending on the variety and local district, sowing or planting may be planned during different periods of the year. Gardeners should avoid severe waterlogging during the monsoon and intense moisture stress during hot weather.

A commonly useful home-garden window is between September and January, although regional conditions may allow additional cycles.

Karnataka

Seeds may be raised during the post-monsoon and winter periods when temperatures are moderate.

In irrigated areas, additional planting windows may be possible after confirming that the variety is suitable for the selected season.

North India

Small onion cultivation is less common than regular bulb onion cultivation in some northern regions, but the plants can still be grown under suitable conditions.

Seeds may be started during:

• June to July for a monsoon-season crop
• October to November for a winter-season crop

Protect seedlings from severe frost in colder locations.

Hill Regions

In cooler hill areas, sow seeds during late winter or spring after severe cold conditions have reduced.

Important Seasonal Advice

Use local weather and temperature as the main guide.

Avoid sowing during:

• Extreme summer heat
• Continuous heavy rain
• Severe frost
• Periods when the nursery soil cannot be kept evenly moist
• Seasons unsuitable for the supplied seed variety

For large-scale cultivation, conduct a small trial before planting the complete area.

Climate Requirements

Small onions generally prefer mild conditions during germination and early plant growth.

Warm weather supports bulb development, while relatively dry conditions near maturity help the bulbs form dry outer skins.

Continuous rain and waterlogging can damage roots and bulbs. Extreme heat can dry the nursery medium quickly and weaken young seedlings.

Suitable growing conditions include:

• Moderate warmth during germination
• Good sunlight after seedling establishment
• Regular but controlled irrigation
• Dry weather near harvesting
• Adequate airflow between plants
• Protection from prolonged waterlogging

Sunlight Requirements

Provide approximately six to eight hours of direct sunlight every day.

Sufficient sunlight supports:

• Strong leaf development
• Healthy root growth
• Better bulb formation
• Firmer plant bases
• More uniform maturity

Plants grown in excessive shade may develop:

• Thin leaves
• Weak stems
• Slow growth
• Small bulbs
• Delayed maturity
• Reduced overall performance

For balcony and terrace gardens, select the brightest available location.

A balcony receiving only indirect indoor light is generally unsuitable for onion bulb production.

Soil Requirements

Sambar Onion grows best in loose, fertile and well-drained soil.

The soil should allow the small bulbs to expand without resistance. Hard, compacted soil can restrict bulb growth and make harvesting difficult.

A good soil mixture should:

• Drain excess water
• Retain moderate moisture
• Remain loose
• Contain mature organic matter
• Allow airflow around the roots
• Be free from large stones

Avoid:

• Permanently waterlogged soil
• Heavy compacted clay
• Fresh undecomposed manure
• Pots without drainage holes
• Soil containing construction waste
• Very salty growing media

A practical home-garden potting mixture may contain:

• 40% loose garden soil
• 30% mature compost or vermicompost
• 20% cocopeat
• 10% coarse sand or perlite

Adjust the mixture according to the texture of the available soil.

If the soil is heavy and sticky, add more compost, cocopeat and coarse material.

If the soil is already sandy, use less sand and add slightly more mature compost.

How to Grow Sambar Onion from Seeds

Sambar Onion seeds can be sown directly, but nursery sowing followed by transplantation generally provides better control over moisture and plant spacing.

Step 1 – Select a Nursery Tray

Use a clean seedling tray, shallow container or raised nursery bed.

Ensure that the tray has sufficient drainage holes.

Clean previously used containers before sowing to reduce early seedling problems.

Step 2 – Prepare the Seed-Starting Medium

Use a fine and loose growing medium containing:

• Cocopeat
• Fine garden soil
• Mature compost
• Vermiculite or perlite

Remove stones, sticks and undecomposed material.

Do not press the growing medium too firmly into the tray.

Step 3 – Moisten the Medium

Water the growing medium before sowing.

Allow extra water to drain completely. The medium should feel evenly moist but should not become muddy.

Pre-moistening prevents small onion seeds from being displaced during watering.

Step 4 – Sow the Seeds

Make shallow holes or lines approximately 0.5–1 cm deep.

Place one or two seeds in each nursery cell or maintain a small gap between seeds when using a common tray.

Cover the seeds with a thin layer of fine growing medium.

Avoid sowing too deeply. Deeply buried onion seeds may germinate slowly or fail to reach the surface.

Step 5 – Water Gently

Use a hand sprayer or a watering can with a fine rose attachment.

Avoid pouring water forcefully onto the tray.

Keep the growing medium lightly and consistently moist during germination.

Step 6 – Provide Suitable Light

Place the tray in a bright and well-ventilated location.

After seedlings emerge, gradually expose them to gentle morning sunlight.

Seedlings kept in deep shade may become thin and weak.

Step 7 – Monitor Germination

Seeds may begin germinating within approximately 7–14 days under suitable conditions.

Some seeds may take longer depending on temperature, moisture and seed age.

Do not allow the nursery medium to dry completely during this stage.

Step 8 – Thin Crowded Seedlings

When seedlings emerge too closely, remove weaker plants.

Crowded seedlings compete for sunlight, water and nutrition.

Early thinning supports stronger roots and more upright leaf growth.

Step 9 – Maintain the Nursery

Check seedlings daily.

Water only when required. Remove weeds and damaged seedlings.

Maintain airflow and avoid continuously wet conditions.

Step 10 – Prepare for Transplantation

Healthy seedlings are generally ready for transplantation approximately 35–50 days after sowing.

The exact timing depends on season, temperature and seedling growth.

Signs That Seedlings Are Ready

Healthy transplant-ready seedlings should have:

• Several upright green leaves
• A firm plant base
• Developed roots
• Approximately 10–15 cm height
• No serious pest damage
• No soft or collapsed stem
• Sufficient strength for handling

Do not delay transplantation for too long, as overcrowded nursery seedlings may become weak.

Hardening the Seedlings

Before transplanting, gradually expose seedlings to outdoor conditions.

For approximately five to seven days:

1. Provide gentle morning sunlight.
2. Increase sunlight exposure gradually.
3. Allow the nursery surface to dry slightly between watering.
4. Protect seedlings from extreme heat and heavy rain.
5. Avoid allowing severe wilting.

Hardening helps reduce transplant stress.

Transplanting Sambar Onion Seedlings

Prepare the final garden bed or container before removing seedlings from the nursery.

Loosen the soil and mix in mature compost.

Water the nursery tray before transplanting. Moist soil allows seedlings to be lifted with less root damage.

Make small holes in the final soil and place seedlings shallowly.

Do not bury the green growing point.

Firm the surrounding soil gently and water immediately after transplantation.

For the first few days, keep the soil moderately moist while the plants establish.

Recommended Plant Spacing

Maintain approximately:

Plant-to-plant spacing: 8–10 cm
Row-to-row spacing: 15–25 cm

Spacing may be adjusted according to the expected bulb size and growing method.

Closer spacing may result in smaller bulbs. Wider spacing gives each plant more room for roots and bulb development.

For container growing, avoid placing seedlings at every available point. Overcrowding is one of the most common causes of undersized onions.

Growing Sambar Onion in Pots

Sambar Onion is suitable for container gardening because the bulbs are relatively compact.

Wide containers are more useful than narrow pots.

Recommended Container

Use:

• A grow bag approximately 30–38 cm wide
• A rectangular vegetable planter
• A raised garden container
• A pot at least 20–25 cm deep
• A wide balcony planter with drainage holes

Potting Mixture

Fill the container with loose, fertile and well-drained soil.

Do not use heavy garden soil alone because it may become compacted inside the pot.

Plant Spacing

Maintain approximately 8–10 cm between plants.

A wide grow bag may accommodate several plants when spacing is maintained properly.

Container Placement

Place the pot in a location receiving six to eight hours of direct sunlight.

Rotate the container occasionally if light reaches only one side.

Drainage

Ensure that excess water drains freely.

Do not allow pots to remain in trays filled with stagnant water.

Watering Guide

Onions have relatively shallow roots and require consistent soil moisture during active growth.

Water is especially important during:

• Seed germination
• Seedling growth
• Transplant establishment
• Leaf development
• Early bulb formation

Water when the upper layer of soil begins to feel dry.

Avoid following a fixed daily schedule without checking the soil. Watering frequency changes according to temperature, rainfall, wind, container size and soil texture.

Signs of Insufficient Water

• Drooping leaves
• Dry soil
• Slow growth
• Dry leaf tips
• Small bulbs
• Early maturity

Signs of Excess Water

• Continuously wet soil
• Yellowing leaves
• Soft plant bases
• Seedling collapse
• Root damage
• Bulb rot

Reduce watering as bulbs approach maturity and the leaves begin yellowing or bending naturally.

Stop frequent irrigation approximately one week before harvesting when weather conditions permit.

Feeding and Fertilising

Mix mature compost or vermicompost into the soil before transplanting.

Onion plants require nutrition during leaf and bulb development, but excessive feeding can reduce bulb quality.

A small quantity of vermicompost may be added around established plants.

Avoid applying concentrated fertiliser directly against the stem.

Excess nitrogen can cause excessive leaf growth and delay bulb formation.

For container-grown plants, use lighter applications because fertiliser salts can accumulate in the limited soil volume.

Always follow the directions provided with any purchased plant nutrition product.

Weed Management

Small onion plants compete poorly with weeds because their roots are shallow and their leaves are narrow.

Remove weeds regularly while they are small.

Use your fingers or a shallow hand tool. Avoid deep digging close to onion plants because it can damage roots and developing bulbs.

A thin layer of dry organic mulch can reduce weed growth and moisture loss.

Keep thick mulch away from the bulb neck, especially during humid or rainy weather.

Bulb Development

Bulb formation depends on:

• Variety
• Sowing season
• Temperature
• Natural day length
• Sunlight
• Plant spacing
• Soil fertility
• Water availability
• Seedling health

As the bulb expands, its upper portion may become visible near the soil surface.

Do not repeatedly cover developing bulbs with heavy soil.

Maintain moderate moisture during bulb formation, but avoid waterlogging.

Common Growing Problems

Seeds Are Not Germinating

Possible causes include:

• Deep sowing
• Old seeds
• Dry growing medium
• Excessive watering
• Unsuitable temperature
• Compacted nursery soil

Use fresh seeds, sow shallowly and maintain gentle moisture.

Seedlings Are Falling Over

Possible reasons include:

• Excess water
• Poor airflow
• Crowded sowing
• Low light
• Unclean growing medium

Reduce watering and improve light and ventilation.

Seedlings Are Thin and Weak

Insufficient sunlight and overcrowding commonly cause stretched growth.

Provide brighter light and thin crowded seedlings.

Leaves Are Turning Yellow

Possible causes include:

• Overwatering
• Poor drainage
• Nutrient imbalance
• Root damage
• Natural maturity
• Pest activity

Check the soil before applying additional water.

Bulbs Are Very Small

Small bulbs may result from:

• Overcrowding
• Insufficient sunlight
• Weak seedlings
• Poor soil fertility
• Irregular watering
• Unsuitable sowing season
• Heavy weed competition

Maintain correct spacing and regular care.

Bulbs Are Not Forming

Possible causes include:

• Wrong seasonal timing
• Unsuitable variety for the region
• Excess nitrogen
• Too much shade
• Delayed transplantation
• Excessive crowding
• Repeated moisture stress

Confirm the recommended growing season for the seed batch.

Bulbs Are Splitting

Irregular watering, especially heavy watering after a long dry period, can lead to splitting.

Maintain more consistent soil moisture.

Bulbs Are Rotting

Waterlogged soil, poor drainage and continuous rain may damage bulbs.

Improve drainage and reduce irrigation near maturity.

Dry Leaf Tips

Dry tips can result from heat stress, water stress, root injury or nutrient imbalance.

Check the overall plant and soil condition before changing the watering schedule.

Thrips or Small Insects

Inspect the inner leaf folds for tiny insects, pale patches or silvery marks.

Keep the garden free from weeds and remove heavily damaged leaves.

Use an appropriate garden-care product according to its label directions when required.

Fungal Leaf Problems

High humidity, wet foliage and poor airflow can encourage leaf problems.

Maintain spacing, water near the soil and avoid repeatedly wetting the leaves.

Harvesting Sambar Onion

Sambar Onions may be ready approximately 90–130 days after sowing, depending on the variety, season and growing method.

Possible signs of maturity include:

• Bulbs reaching a usable size
• Reduced new leaf growth
• Yellowing leaves
• Natural bending of the tops
• Softening of the bulb neck
• Dry outer bulb skin

Reduce watering as the crop approaches maturity.

Harvest during dry weather when possible.

Loosen the surrounding soil with a small hand tool and lift the bulbs carefully.

Avoid pulling strongly from hard soil because this can damage the bulbs or necks.

Harvesting Tender Small Onions

Gardeners may harvest some plants earlier for tender bulbs and green tops.

Early-harvested bulbs will be smaller and may have softer outer skins.

Use early harvests quickly because they may not store as long as fully mature and properly cured onions.

Curing Harvested Bulbs

Curing dries the bulb neck and outer skin before storage.

After harvesting:

1. Remove loose soil gently.
2. Do not wash bulbs intended for storage.
3. Spread the bulbs in a single layer.
4. Keep them in a shaded and ventilated location.
5. Protect them from rain.
6. Allow the leaves and necks to dry.
7. Remove damaged or soft bulbs.
8. Trim fully dried foliage before storage.

Traditional small-onion guidance recommends drying harvested bulbs in shade before storage.

Storage Guide

Store fully cured small onions in:

• Mesh bags
• Ventilated baskets
• Open crates
• Dry and shaded rooms
• Locations with good airflow

Avoid airtight plastic bags because trapped moisture can encourage spoilage.

Check stored onions regularly.

Remove bulbs showing:

• Softness
• Mould
• Sprouting
• Unpleasant smell
• Visible damage

Storage duration varies according to variety, curing quality, humidity and temperature.

Seed-Saving Information

The current SeedVanam listing describes the product as open-pollinated.

Open-pollinated onions may be used for seed saving when correct isolation and selection practices are followed.

Onions generally require a longer reproductive cycle to produce flowers and seeds.

To save seeds:

• Select healthy and true-to-type bulbs
• Cure and store selected bulbs properly
• Replant them during a suitable season
• Keep different flowering onion varieties separated
• Allow flower heads to mature
• Collect drying seed heads carefully
• Dry seeds completely
• Store them away from moisture
• Label the variety and collection date

Cross-pollination with other onion varieties can affect future plants.

Seed-saving results depend on isolation, selection and correct storage.

Why Buy Sambar Onion Seeds from SeedVanam?

SeedVanam makes it convenient for gardeners across India to buy Sambar Onion Small Onion Desi Seeds online.

These seeds are suitable for:

• Home kitchen gardens
• Terrace gardens
• Balcony grow bags
• Raised vegetable beds
• Community gardens
• Small-scale cultivation
• Traditional vegetable gardens

The current packet contains approximately 40 seeds.

Detailed growing guidance helps gardeners understand seed sowing, nursery care, transplantation, spacing, sunlight, watering, bulb formation, harvesting and storage.

Order Sambar Onion Small Onion Desi Seeds online from SeedVanam and begin growing flavourful small onions for your everyday kitchen needs.

Frequently Asked Questions

What is Sambar Onion?

Sambar Onion is a small onion type commonly used in South Indian sambar, curries, gravies, pickles and chutneys.

Is Sambar Onion the same as shallot?

The terms Sambar Onion, Small Onion, Madras Onion and Shallot are often used interchangeably in Indian markets. Exact botanical growth habits may vary according to the variety.

How many seeds are included?

The current SeedVanam listing contains approximately 40 seeds per packet.

How long do seeds take to germinate?

Seeds generally begin germinating within approximately 7–14 days under suitable conditions.

How deeply should the seeds be sown?

Sow approximately 0.5–1 cm deep and cover with a thin layer of fine growing medium.

Can the seeds be directly sown?

Yes, but raising seedlings in a nursery tray generally provides better control over moisture and spacing.

When should seedlings be transplanted?

Healthy seedlings can generally be transplanted approximately 35–50 days after sowing.

Can Sambar Onions be grown in pots?

Yes. Use wide pots, rectangular planters or grow bags with sufficient drainage.

What pot size is suitable?

Use a container at least 20–25 cm deep and approximately 30 cm or more in width.

How much sunlight is required?

Provide approximately six to eight hours of direct sunlight daily.

What spacing should be maintained?

Maintain approximately 8–10 cm between plants and 15–25 cm between rows.

How often should the plants be watered?

Water whenever the upper soil begins to dry. Maintain even moisture without causing waterlogging.

How long does the crop take to mature?

Harvesting may begin approximately 90–130 days after sowing, depending on variety and conditions.

Can the green leaves be used?

Tender green leaves may be harvested lightly. Excessive leaf removal may reduce bulb size.

Why are my bulbs small?

Overcrowding, insufficient sunlight, poor soil nutrition, weak seedlings and irregular watering can result in small bulbs.

Why are bulbs not forming?

Unsuitable sowing time, excess nitrogen, inadequate sunlight or incorrect spacing can affect bulb formation.

When should watering be reduced?

Reduce watering as leaves begin yellowing or bending and the bulbs approach maturity.

How do I know when bulbs are ready?

Bulbs are usually ready when they reach a usable size and the tops begin yellowing, bending and drying naturally.

Should harvested onions be washed?

Do not wash bulbs intended for storage. Remove loose soil and cure them in a shaded, ventilated location.

Can seeds be collected from mature plants?

Seeds may be collected from open-pollinated plants, but proper isolation and a longer seed-production cycle are required.

Are Sambar Onions suitable for farming?

They may be suitable for cultivation, but growers should confirm seasonal and regional suitability and conduct a small trial before planting a large area.