How to Grow Onions (Piyaz) at Home in Pakistan

Onions, commonly called piyaz (پیاز), are used in almost every Pakistani kitchen. Growing them from seed takes patience, but a sunny garden bed or wide container can provide fresh green onions followed by mature bulbs.

Most bulb onions are first raised in a nursery and then transplanted into their final position. The plants need time to develop healthy leaves before bulb formation begins. Planting at the correct time, choosing a variety suited to your region and maintaining steady moisture all influence the final bulb size.

Onion seeds usually germinate within 7 to 21 days. Seedlings may be ready for transplanting after about 6 to 8 weeks, while mature bulbs can take several additional months.

Quick Guide

Growing Detail	Recommendation
Best season	Varies by region; autumn nursery sowing is common in Punjab
Sowing method	Nursery sowing followed by transplanting
Germination time	Usually 7 to 21 days
Sowing depth	¼ to ½ inch
Transplanting age	Around 6 to 8 weeks
Bulb spacing	About 4 inches; wider for larger bulbs
Green onion spacing	Around 1 to 2 inches
Sunlight	At least 6 hours, preferably 8 hours
Container depth	Around 10 to 12 inches
Bulb harvest	Commonly 4 to 6 months after transplanting, depending on variety and region

Best Time

Pakistan does not have one onion-sowing month that suits every region. The season changes between Punjab, Sindh, Khyber Pakhtunkhwa, Balochistan and colder upland areas.

In Lahore, Faisalabad and much of irrigated Punjab, sow seeds in a nursery from October to November. Transplant the seedlings from December to January. Under this traditional schedule, mature bulbs are commonly harvested from May to June.

In upper Sindh, including areas around Sukkur, nursery sowing commonly begins from October into December. Seedlings are transplanted during the cooler months, and the bulbs mature during spring.

Lower Sindh follows an earlier regional schedule. Around Hyderabad and Karachi, some locally suitable varieties are sown from June to September, transplanted from July into October and harvested from autumn through winter. Raising seedlings during summer and monsoon weather requires protection from strong heat, heavy rain and waterlogged soil.

In valleys of Khyber Pakhtunkhwa, autumn nursery sowing may be followed by winter transplanting and a later harvest than in Punjab. At higher elevations and in colder areas around Quetta, planting can move to February or March after severe frost has passed.

These dates describe both nursery sowing and transplanting, which are separate stages. If you are buying ready onion seedlings, follow the transplanting period rather than the seed-sowing period.

Choosing a Variety

Onion varieties differ in flavour, bulb colour, storage life, maturity time and regional suitability.

Traditional Desi and locally selected onions are valued for the familiar flavour used in Pakistani cooking. Phulkara is suited to the usual Punjab schedule, where its nursery is raised from mid-October through November before winter transplanting.

Hybrid onions can be useful when you want vigorous growth, earlier maturity or more even bulb development.

Bunching Onion is a separate choice for gardeners who mainly want Hari Pyaz. It produces green leaves and slender white stems rather than the large storage bulb expected from an ordinary bulb onion.

Browse suitable regional, Desi, Hybrid and bunching varieties in our Onion Seeds collection.

Pots and Beds

Use a container around 10 to 12 inches deep with several drainage holes. Onion roots remain relatively shallow, so width and plant spacing matter more than unnecessary extra depth.

A round 12-inch pot can usually hold about five to seven bulb onions when they remain approximately 4 inches apart. Fewer plants will have more room to develop larger bulbs.

Green onions can remain closer together because they are harvested before large bulbs form. Leave approximately 1 to 2 inches between them.

In garden beds, keep bulb onions around 4 inches apart with 10 to 12 inches between rows. Increase the spacing to 5 or 6 inches when growing a variety expected to make large bulbs.

Choose a position that does not collect standing water after irrigation or rain. A raised bed is helpful where the garden soil drains slowly.

Soil Preparation

Onions grow best in loose, fertile soil that holds moisture without remaining waterlogged. Their shallow roots struggle to compete in hard or badly compacted soil.

Loosen the upper 6 to 8 inches and remove stones, weeds and undecomposed roots. Break up heavy lumps before planting so new roots can spread easily.

Mix well-rotted compost or Vermicompost through the soil. Avoid leaving concentrated pockets of fertilizer directly beneath young roots.

Heavy clay can be improved with mature compost and a suitable drainage material. In containers, use a balanced potting mixture instead of dense garden soil alone.

Level the bed before transplanting. Uneven depressions can collect water around the base of the plants and encourage rot.

Starting Seeds

Use fresh onion seed where possible. Onion seed can lose germination strength during long or unsuitable storage.

A seedling tray, shallow nursery pot or small prepared nursery bed can be used. A loose Seed Starter Mix helps the fine roots develop without sitting in heavy soil.

1. Fill the nursery container with damp seed-starting soil.
2. Sow seeds ¼ to ½ inch deep and cover them lightly.
3. Water with a fine spray so the seeds remain in place.
4. Keep the surface moist during germination without leaving it soggy.
5. Move emerging seedlings into bright light as soon as they appear.

Seedlings growing without enough light become long, weak and difficult to transplant. A bright-looking indoor room may still be too dark unless direct sunlight reaches the tray.

In an outdoor nursery, protect the surface from heavy rain and strong midday heat. Remove heavy covering as soon as seedlings begin appearing so they receive light and airflow.

Growth Stages

Onions spend their early months building leaves and roots. Bulb swelling begins later when the plant is mature enough and the day length suits the variety.

Growth Stage	What to Expect
First week	Seeds absorb moisture and roots begin developing
About 7 to 21 days	Fine, looped seedlings emerge
Following weeks	Seedlings straighten and produce additional leaves
Around 6 to 8 weeks	Healthy seedlings may be ready for transplanting
After transplanting	Roots settle and new upright leaves develop
Later growth	The base begins widening as bulb formation starts
Maturity	Necks soften and the green tops fall naturally

Cold weather can slow both nursery growth and recovery after transplanting. Warm, dry conditions can shorten the period available for healthy leaf development.

The maturity period printed on a seed packet may be counted from transplanting rather than from the original nursery-sowing date. Include the nursery period when estimating how long onions will take from seed.

Transplanting

Seedlings are usually ready when they are around 4 to 6 inches tall, have several healthy leaves and can be handled without falling apart.

Water the nursery before lifting them. Moist soil releases the roots more easily and reduces damage.

Separate crowded seedlings carefully. Hold them by their leaves rather than squeezing the soft lower stem.

Make a narrow planting hole and place the roots downward. Cover the roots and the pale lower part of the stem, keeping the green growing point above the soil.

Leave about 4 inches between plants for ordinary bulb onions. Wider spacing can produce larger bulbs, while closer spacing is suitable for green onions that will be harvested early.

Water immediately after transplanting to settle the soil around the roots. Keep the soil lightly moist while the plants recover and begin making new growth.

Seedlings raised under cover should be introduced gradually to outdoor sunlight and wind over several days before transplanting.

Direct Sowing

Onions can also be sown directly into a prepared container or garden bed. This avoids transplanting but requires careful thinning.

Sow seeds ¼ to ½ inch deep and keep the surface moist until they emerge. Remove crowded seedlings early, leaving about 1 to 2 inches between plants at first.

Harvest alternate plants as green onions. This gradually creates the final 4-inch spacing required by the remaining bulb onions.

Direct sowing is more successful when the planting season is long enough for seedlings to establish before bulb formation begins.

Plant Care

Sunlight

Give bulb onions at least six hours of direct sunlight each day. Eight hours or more is preferable where winter sunlight is mild.

A shaded plant may develop long green leaves but still form a small bulb. Move containers away from walls, trees or railings that block much of the winter sun.

Watering

Onions have shallow roots and need regular moisture while leaves and bulbs are developing.

Check the soil below the surface before watering. Water when the upper layer begins drying, applying enough moisture to reach the full root area.

Containers can dry quickly in rooftop wind, even during cool weather. Garden beds may remain wet for longer, especially in clay soil.

Irregular watering can restrict bulb size. At the same time, constantly wet soil can damage roots and encourage rot.

Continue regular watering while the bulbs are actively swelling. Reduce and then stop watering when the bulbs have matured and the tops begin falling naturally.

Feeding

Onions need more nutrition than carrots or radishes because they spend several months developing leaves before making bulbs.

Soil prepared with compost or vermicompost provides a useful start. If additional feeding is needed, apply a balanced vegetable fertilizer at the recommended rate while the plants are building leaves.

Avoid excessive nitrogen once the bulbs are well into swelling. Late heavy feeding can keep the necks thick, delay maturity and reduce storage life.

Weeding

Remove weeds while they are small. Onion roots remain close to the surface and compete poorly with larger weeds.

Pull weeds carefully or loosen only the upper soil. Deep digging beside the plants can cut their roots or injure developing bulbs.

Airflow

Leave enough room between plants for air to move through the upright leaves. Crowded, damp growth stays wet longer after watering and is more vulnerable to leaf diseases.

Aim water at the soil when possible. Morning watering gives splashed leaves time to dry.

Bulb Growth

A bulb onion gradually widens at the soil surface. It is normal for the upper part of the bulb to become visible.

Keep loose soil around the roots, but do not repeatedly pile soil over a developing bulb. Deep covering can keep the neck damp and interfere with drying at maturity.

This differs from Bunching Onion grown for long white stems. Loose soil can be drawn lightly around established bunching onions when a longer white portion is wanted.

Healthy leaves are essential during bulb development. Repeatedly cutting the leaves from a bulb onion reduces the plant’s ability to enlarge the bulb.

Flower Stalks

A thick, firm central stalk ending in a flower bud means the onion has started bolting.

Bolting can follow cold exposure after the plant has already reached a certain size. Irregular temperatures, early planting or the wrong variety can also contribute.

A bolted onion directs energy toward flowering instead of making a good storage bulb. Harvest and use it promptly. The centre may become hard, and the bulb usually does not store well.

Cutting off the flower stalk does not return the plant to normal bulb development.

Plant Problems

Problem	What to Check	What to Do
Few seeds germinate	Old seed, dry surface or deep sowing	Use fresh seed, cover lightly and maintain surface moisture
Seedlings fall over	Waterlogged soil, crowding or poor airflow	Remove affected seedlings, improve drainage and allow more space
Long, weak seedlings	Insufficient light	Move the nursery into stronger light gradually
Large leaves but no bulb	Unsuitable day length or late planting	Use a regionally suitable variety during its recommended season
Small bulbs	Crowding, shade, dry soil, late planting or repeated leaf cutting	Correct spacing and maintain healthy leaves and steady moisture
Yellow or brown leaf tips	Dry roots, wet soil, heat or fertilizer salts	Check soil moisture and recent feeding before making changes
Silvery or twisted leaves	Thrips feeding between folded leaves	Inspect leaf bases and dislodge light infestations with directed water
Purple or brown leaf patches	Prolonged leaf wetness or fungal disease	Remove badly affected leaves and improve spacing and airflow
Soft bulb base	Waterlogged soil, injury or rot	Remove affected plants and correct the drainage
Thick necks at maturity	Late nitrogen feeding or incomplete maturity	Stop late feeding and allow healthy tops to fall naturally
Flower stalk develops	Bolting caused by temperature or timing	Harvest the affected onion for prompt use

Thrips often hide where the leaves emerge from the centre, so damage may appear before the insects are easily noticed.

For persistent sap-sucking pests, Neem Oil can be used at the label dilution during cool morning or evening hours. If green leaves will be eaten, allow the recommended 7 to 15 days between spraying and harvesting.

Soft or foul-smelling bulbs should be removed rather than left beside healthy plants.

Green Onions

Green onions can be harvested before the base forms a mature bulb. Begin when the stems are large enough for kitchen use and the leaves look healthy.

Pull the entire young plant, or harvest alternate plants from a crowded row. Removing every second plant gives the remaining onions additional room to form bulbs.

Bunching Onion can be cut for leaves while leaving the lower stem and roots in place. Ordinary bulb onions are better harvested as whole young plants when used for Hari Pyaz.

Wash the leaves thoroughly and use them while fresh.

Mature Bulbs

Mature onions are ready when their necks soften and many of the tops bend and fall naturally. The outer skin also begins becoming dry and papery.

In Punjab’s usual autumn nursery schedule, this often happens from May to June. Other regions and varieties follow different calendars.

Do not bend healthy green leaves to force maturity. This interrupts the plant before the bulb has finished developing.

Choose a dry day for harvesting. Loosen the surrounding soil with a small fork and lift each bulb carefully without cutting or bruising it.

Move freshly lifted onions out of severe midday sunlight. Strong summer sun can damage exposed bulbs before they are properly dried.

Drying Onions

Freshly harvested storage onions need to dry before being placed in bags or containers. This process is called curing.

Arrange the onions in a single layer in a dry, shaded and well-ventilated place. A mesh tray, slatted shelf or clean dry surface that allows air movement works well.

Leave the tops attached during curing. Turn the bulbs gently if one side remains damp.

Drying commonly takes around two to three weeks. The onions are ready when the outer skins feel papery, the necks are completely dry and no moisture remains around the base.

Once dry, trim the leaves about an inch above the bulbs and remove loose soil. Avoid cutting into the bulb itself.

Storage

Store only firm, properly cured onions. Use damaged, bolted, soft or thick-necked bulbs first because they are more likely to spoil.

Place sound onions in mesh bags, open baskets or shallow ventilated trays. Sealed plastic traps moisture and encourages rot.

Choose a cool, dry and dark location with airflow. Check the onions regularly and remove any bulb that begins softening or sprouting.

Sweet and mild onions generally store for less time than firm, strongly flavoured storage varieties. Storage life also depends on how completely the neck dried before packing.

FAQs

Can I plant a sprouted kitchen onion?

Yes. A sprouted onion can be planted in soil and may provide green leaves. An old kitchen onion is less dependable for producing a good storage bulb because its age, variety and previous storage conditions are unknown.

Can I keep cutting leaves from a bulb onion?

A few leaves can be taken, but repeated heavy cutting reduces bulb growth. Grow Bunching Onion separately when regular Hari Pyaz harvesting is the main purpose.

Can I save seeds from my onions?

Onions normally flower during their second growing season. A healthy bulb must survive, regrow and produce a mature flower head before seeds can be collected. Seeds saved from Hybrid onions may not produce plants identical to the parent.

What is the difference between onion seeds and sets?

Onion seeds are true seeds and take longer to reach maturity. Sets are small dormant bulbs produced during an earlier season. Sets establish faster, but large or badly stored sets can be more likely to form flower stalks.