Eggplant
Also called: باذنجان · Bethinjan · Brinjal · Aubergine
The longest-lived and most heat-tolerant of the nightshades. Planted in October it keeps producing into May — a full month longer than tomato.
The year at a glance
Each month is split in half. The outline marks now.
Stage by stage
Stage 1 of 9
Seed
Days 0–7
Seed
Days 0–7The seed sits in the soil taking up water and swelling. Nothing shows above the surface — everything is happening underground.
Do now
- Water lightly and often so the soil stays damp but never soaked. Letting it dry out between waterings kills the seed before it sprouts.
- Cover the surface with a thin layer of straw or compost to slow evaporation and steady the temperature.
- Label what you sowed and when. You will need the date to work out the harvest.
Watch for
- A hard crust forming on sandy soil after watering, which traps the sprout underneath. Break it gently.
- Ants carrying small seeds away — a very common problem in Qatari gardens.
In Qatar
Eggplant seed is slow. Soak it 24 hours in warm water before sowing to cut three or four days off.
Germination
Days 8–16The seed coat splits: a root pushes down and a shoot pushes up. The two seed leaves that appear are not true leaves — they are the seed’s own food store.
Do now
- Keep moisture constant. The first root is very fine and a single dry day can end the seedling.
- Remove any covering as soon as the first sprout shows, or it will stretch thin looking for light.
- Give bright, indirect light. Direct midday sun will scorch a new seedling within hours.
Watch for
- A long, thin, pale stem: the seedling is not getting enough light and will collapse.
- Sudden wilting with a pinched stem at soil level — damping off, caused by overwatering.
In Qatar
Needs warmer soil than tomato to germinate — Qatar’s August warmth is ideal, as long as the tray is shaded.
Seedling
Days 17–38The first true leaves appear, shaped differently from the seed leaves. The plant is now feeding itself and the roots are branching fast.
Do now
- Thin crowded seedlings and keep the strongest. Crowding gives you many weak plants instead of one good one.
- Start watering less often but more deeply, to drive the roots downwards.
- Harden the seedling off — build up its sun exposure over a week before transplanting.
Watch for
- Yellowing lower leaves: nitrogen shortage, very common in Qatar’s poor sandy soil.
- Small holes or chewed edges, meaning snails or young grasshoppers.
In Qatar
Eggplant seedlings run two weeks behind tomato. Do not panic at the slowness or over-feed to hurry it.
Vegetative growth
Days 39–64The plant is building its frame — stem, leaves, branches. Every leaf added now means more fruit later, because leaves are the sugar factory.
Do now
- Stake the plant now while it is small — staking late damages the roots.
- Feed with a nitrogen-rich fertiliser every two weeks to push leafy growth.
- Water deeply in the early morning. Evening watering plus high humidity invites fungal disease.
- Check the undersides of leaves weekly for whitefly and aphids.
Watch for
- Lush leaves but no flowers: too much nitrogen. Stop the nitrogen feed.
- Midday wilting even though the soil is moist: heat stress — the plant needs shade.
In Qatar
Unlike tomato, do not bury the stem when transplanting — eggplant will not root from it and will simply rot.
Flowering
Days 65–80The plant switches from building a body to making offspring. Flowers open, and every one that is successfully pollinated becomes a fruit.
Do now
- Cut back nitrogen and raise potassium and phosphorus to support fruit set.
- Never let the soil dry out completely between waterings. Drought now makes the flowers drop.
- Shake the plant gently in the morning, or use a small brush, to help pollination if bees are scarce.
Watch for
- Flowers dropping without setting fruit: above about 35 °C the pollen goes sterile. Get shade over it now.
- No pollinating insects at all — common on enclosed roofs and balconies.
In Qatar
Eggplant will flower about 5 °C hotter than tomato will, which is why it carries on into May.
Fruit set
Days 81–100The petals wither and the ovary behind them swells. Small, hard green fruits appear and grow day by day.
Do now
- Make watering perfectly regular. Swinging between dry and drenched causes most fruit cracking and rot.
- Support the fruiting branches before the weight breaks them.
- Add calcium if your irrigation water is brackish, to head off blossom-end rot.
Watch for
- A sunken brown patch at the base of the fruit: calcium shortage from irregular watering or salinity.
- Small fruits yellowing and dropping: the plant is carrying more than it can feed, or it is thirsty.
In Qatar
The first fruits drain the plant. Pick the first two small to push it into building a stronger frame.
Ripening
Days 101–115The fruit stops growing and starts changing colour, turning its starch into sugar. Heat speeds this stage up.
Do now
- Ease off the water slightly to concentrate the flavour — but never to the point of wilting.
- Shade exposed fruit with the plant’s own leaves to prevent sunscald.
- Pick as things ripen. Leaving fruit on the plant stops it setting new ones.
Watch for
- White or leathery brown patches on the sun-facing side: sunscald.
- A small hole with rot inside, meaning fruit worm.
In Qatar
Eggplant is eaten biologically unripe. Glossy purple is the signal, not softness.
Harvest
Days 116–190The fruit is ready. The plant is at peak production and will keep bearing as long as you keep picking and the weather holds.
Do now
- Pick in the early morning when the fruit is full of water and will keep longest.
- Use scissors rather than pulling by hand, so you do not tear the branch.
- Keep feeding potassium every two weeks to stretch the picking season out.
Watch for
- New fruit coming smaller: the plant is exhausted and needs feeding.
- The seasonal heat rising, which will shut production down within weeks.
In Qatar
A very long picking season, November to May. With 30% shade netting from April it can run into June.
End of cycle
Days 191–230Production tails off and the leaves yellow. As the heat builds the plant stops setting fruit altogether.
Do now
- Bring in the last of the fruit, even the ones not fully ripe.
- Save seed from the best fruit on the strongest plant if you want to grow it again.
- Pull the plant and compost the healthy remains; bin or burn anything diseased.
- Work compost into the soil now, ready for the next Al-Wasm.
Watch for
- Leaving diseased plants in the ground carries pests over to next season’s crop.
- Bare soil under the sun goes dead. Cover it or sow a green manure.
In Qatar
You can cut eggplant back hard in May and shade it through summer for an early autumn crop — worth trying in Qatar.
- Sun
- Full sun
- 60 cm apart
- Sow 1 cm deep
- Pot from 25 L
- Solanaceae
Shade net from April
Grows well with
Keep away from
- Water
- High
- Salt tolerance
- Medium
- Heat tolerance
- High
15 L/week in winter, 30 L in summer
Soil preparation
Wants deep, rich soil. Work in 6 kg of manure per square metre and add potassium later (banana-peel booster or potassium sulphate). Skip wood ash: it pushes alkaline soil higher still.
Pests
Fruit and shoot borer
- Sign
- Tender shoot tips wilting, and a small hole in the fruit with a tunnel inside.
- What to do
- Cut wilted shoots 5 cm below the damage and destroy them. Never leave infested fruit on the plant.
Aphids
- Sign
- Green or black clusters on the growing tips and new leaves curling.
- What to do
- Blast with water first, then potassium soap if they persist. Encourage ladybirds.
Common problems
Tough, bitter fruit
- Cause
- Leaving the fruit on past its prime, or water stress while it was growing.
- Fix
- Pick when the skin is glossy and holds a light thumb-press. Dull skin means you left it too long.
Flowers but no fruit
- Cause
- Short-styled flowers that cannot self-pollinate, caused by poor feeding or extreme heat.
- Fix
- Feed regularly and shake the plant in the morning. The long-styled flowers are the ones that bear.
Picking
Pick small and often. Eggplant taken at two-thirds of full size tastes far better and pushes the plant to set more.
Keeping
Keeps a week somewhere cool. More than four days in the fridge causes brown pitting.