How to Grow Balsam (Gul Mehndi) From Seed in Monsoon Pots
To grow balsam (Gul Mehndi, Impatiens balsamina) from seed, sow it in June or July when the monsoon humidity arrives, press the seeds just under the surface of a moist, loose mix, and give the seedlings at least half a day of sun. Most varieties start flowering roughly two months after sowing and keep going into autumn. It is a one-season plant, so the real skill is saving the seeds before the pods fire them across your roof.
Quick facts
- Plant: Impatiens balsamina, a frost-tender annual
- Sowing in the plains: June to July (a spring sowing in March works in Karachi)
- Sun: 4 to 6 hours, with shade after 1 pm in May and June
- Pot: 3 to 5 litres (15 to 20 cm) per plant, or three plants in a 30 cm pot
- Flowers: roughly 8 to 10 weeks after sowing, often until October
- Beginner’s choice: seed, which is cheap and quick; nursery seedlings only if you start late
Prefer to listen? This post as a 7 min video · Watch the video
When should you sow balsam seeds in Pakistan and North India?
Balsam is the classic barsaat flower. It wants warm soil and humid air, and the scorching dry weeks before the monsoon wilt young seedlings faster than you can water them.
| Zone | Sow | Flowers |
|---|---|---|
| Coastal (Karachi) | March or June to July | May onward, or August to November |
| Hot dry (Multan, Sukkur, Bahawalpur) | Late June to July | September to October |
| Punjab plains (Lahore, Faisalabad, Delhi) | June to July | August to October |
| Islamabad, Peshawar | June | August to October |
| Hills | April to May | July to September |
Sowing in April in Multan is a common mistake. The plants survive, barely, then sulk all summer.
How do you grow balsam from seed, step by step?
- Fill a tray or small pots with a light mix: 1 part garden soil, 1 part compost, 1 part cocopeat or fine sand. Our seed starting guide covers trays and hardening off.
- Water the mix first so it is evenly damp, not muddy.
- Press seeds in about 5 mm deep and 3 to 5 cm apart, then sprinkle a pinch of mix over them.
- Keep in bright shade. In warm weather seedlings usually appear within about a week.
- Move to sun gradually once there are two true leaves: two hours of morning sun first, then more over a week.
- Transplant at 6 to 8 cm tall into final pots, one plant per 15 to 20 cm pot. Set it slightly deeper than it was.
Balsam self-seeds freely, so once you have grown it in a bed you may find seedlings popping up the next monsoon. Pot them up while small; they transplant easily.
Seed or nursery seedlings?
For a beginner, seed wins. Balsam germinates quickly and reliably, and a packet gives dozens of plants for the price of two nursery pots. Buy seedlings only if you are starting after mid-August, when sown seed would barely flower before the cold. Pick short, stocky ones with no buds yet; plants already in flower in tiny bags often stall after transplanting.
How do you care for balsam in pots?
Sun and position
Four to six hours of sun gives the most flowers. An east-facing balcony is close to perfect. On a west roof in the Punjab, put the pots where they get afternoon shade, or the leaves droop and scorch.
Watering
Balsam has soft, juicy stems and dislikes drying out. Water when the top 2 cm feels dry, which in hot spells can mean every day for small pots. During monsoon downpours, the risk flips: tip out saucers so roots don’t sit in water, and so mosquitoes don’t breed there. Our potting mix guide helps if your pots stay soggy.
Pinching and feeding
When a plant is about 15 cm tall, pinch out the growing tip. It branches into a bushier plant with far more flowers along the stems. Feed with a handful of compost at transplanting and a liquid feed every two weeks once buds form; a balanced or slightly higher potassium fertiliser at half the label strength suits it. Too much nitrogen gives big leaves that hide the flowers.
Deadheading
Balsam flowers sit close to the stem under the leaves. Pick off faded ones and young green pods if you want flowering to continue longer; leave some pods on later if you want seed.
Why is my balsam not flowering?
- Too little sun: tall, thin stems and no buds. Move it to a sunnier spot.
- Too much nitrogen: lush leaves, few flowers. Stop urea or rich manure tea.
- Sown too late: after mid-August in the Punjab, cool nights arrive before it matures.
- Pot-bound or dry: repeated wilting stops bud formation.
- It already flowered: look under the leaves; balsam blooms hide there.
What pests and diseases attack balsam?
Mites in hot dry weather (fine speckling and webbing under leaves): spray the undersides with plain water every morning for a week. Aphids on new tips: wipe or hose off, then a mild soap solution. In wet weeks, stems may blacken and collapse at soil level, which is a rot; remove that plant and let the pot dry more between waterings. Snails love the young seedlings on monsoon nights, so check with a torch.
How do you save balsam seeds?
This is the fun part, and the part children remember. Ripe pods turn from green to yellowish and swell. Touch one and it splits, curls and flings the seeds.
- Slip a small paper bag over a plump, yellowing pod and close it gently around the stem.
- Squeeze the pod through the bag; the seeds land inside.
- Spread the seeds on paper in shade for a week.
- Store in a labelled paper envelope inside a closed jar in a cool cupboard until next June.
Colours from saved seed may vary from the parent, especially if you grew mixed shades side by side.
Is balsam annual or perennial?
Annual. It grows, flowers, sets seed and dies within one season, and frost kills it outright. In Karachi a plant may limp into winter, but it is not worth keeping. Save seed and start fresh.
Balsam leaves are listed as mildly poisonous if eaten raw in quantity, so teach children to pop the pods and leave the leaves alone. Exploding pods can flick seed into eyes: let kids hold the bag, not their face, near the pod. Garden balsam is not the plant used for mehndi dye despite the name; don’t put its leaves on skin as henna. If a child or pet eats a lot of the plant and vomits or seems unwell, call a doctor or vet and keep a piece of the plant to show them.
Balsam growing questions people search
How long does balsam take to flower from seed?
Usually about 8 to 10 weeks in warm monsoon weather. A June sowing in Lahore typically opens its first flowers in August.
Can balsam grow in shade?
It survives in light shade but flowers poorly. Aim for at least four hours of sun, ideally in the morning.
Why are my balsam leaves curling or speckled?
Fine pale speckles with curling usually mean spider mites in dry heat. Spray leaf undersides with water daily for a week and keep the plant from drying out.
Can I grow balsam in winter?
Not in the Punjab or northern plains; cold nights stunt it and frost kills it. Karachi gardeners can sow in early spring instead.
How many balsam plants fit in one pot?
One in a 15 to 20 cm pot, or three in a 30 cm pot. Crowded plants grow tall and flower less.
Do balsam seeds need soaking before sowing?
No. They are small and germinate quickly in warm, damp mix. Soaking just makes them hard to handle.
Is gul mehndi the same as the henna plant?
No. Gul mehndi is garden balsam, an annual flower. Henna (mehndi) is Lawsonia inermis, a shrub whose leaves give the dye.
Is balsam safe for children to grow?
Yes, with supervision. It is a great first plant for kids because it grows fast and the pods pop, but leaves should not be eaten.
More flowers and shrubs for pots are in Phool aur Paudhe.