How to grow spider plant

Use seed that has been stored dry for at least 6 months — up to about a year is ideal. Seed you saved last season and kept dry is perfect; seed just picked off a plant is not ready to sow.

Sort your seed out in the month before sowing, so you still have time to test it and, if it is slow, wake it up or find better.

Keep the seed dry, cool and in the dark right up to sowing — damp or hot storage kills it before it ever reaches the ground.

If you fear the seed is still sleepy, wake it up (break its 'sleep'): rub it gently with sand or between two bits of sandpaper to scratch the hard coat, soak it in water overnight (about 16 hours), or keep it somewhere warm (about 40°C — a hot room) for a day or two before sowing.

Take a pinch of seed at random from your batch — count out about 20 seeds if you can (they are tiny).

Lay them on a damp cloth or piece of tissue, fold it over, and keep it somewhere warm and dark — spider-plant seed needs darkness and warmth to sprout. Keep it just damp, not dripping; wet it again if it dries.

Leave it about a week, then count how many have pushed out a little white root or shoot.

Work out the share that sprouted — for example, 10 out of 20 is half (50%).

Half or more sprouting (at least 5 in every 10) → the seed is good enough, sow it. Spider plant naturally comes up less evenly than grains, so half is a fair pass.

If fewer than half sprout → don't trust this seed. First wake it up (soak overnight or scratch the coat) and test again; or buy fresh aged / certified seed; or plan to sow much thicker and thin later. Sort it out before you commit the field.

Dig the bed over and break the soil down to a fine, crumbly tilth (loose, crumbly soil with no big clods). Dust-fine seed cannot climb up through lumps and air pockets.

Spread well-rotted manure or compost — dark, crumbly, no strong smell — evenly over the bed. A wheelbarrow-load (about 50 kg) covers roughly a patch 10 paces by 10 paces (about one stride each way); use up to twice as much on poor, sandy soil.

Work the manure into the topsoil and level the bed so water spreads evenly and never pools. Spider plant hates 'wet feet' (waterlogged roots), so on flat or heavy ground make raised beds or ridges to drain.

If your soil is known to be poor in phosphorus (P) — the nutrient that builds early roots — work in a little P fertiliser (such as single superphosphate) now; your recommendation gives the amount.

Sow on a warm day when the soil is moist. Spider plant likes warm soil — best around 30°C by day, cooler at night.

Because the seed is dust-fine, first mix your pinch of seed with a handful of dry sand or wood ash. Then you can scatter it thinly and evenly instead of in clumps.

Sow in rows about 30 cm apart — one and a half hand-spans (a hand-span is thumb-tip to little-finger-tip with the fingers spread, about 20 cm). Dribble the seed-and-sand thinly along a shallow line, or scatter it over the bed.

Cover the seed only ½–1 cm deep — a fingernail's depth — with a light sprinkle of fine soil. It sprouts in the dark, so it needs a cover; but a deep cover buries it too far to ever reach the top.

Firm the soil gently over the seed so it sits snug in moist earth, and keep the bed damp. Seedlings show in about 5 days, up to 14.

From sowing until the seedlings are up (about the first week), keep the top of the bed damp at all times — never let it dry out.

Water gently with a fine spray (a watering-can rose) or a soft sprinkle, once or twice a day in warm weather. A hard splash washes the fine seed away or buries it too deep.

Water in the cool of the morning or evening, so less is lost to the sun and the surface stays moist longer.

A very light mulch — thin dry grass, or a shade cloth — helps hold moisture and warmth. But lift it the moment seedlings appear, or they stretch thin reaching for light.

If a hot, dry spell keeps drying the bed out, water more often and shade it in the heat of the day. One missed day at this stage can cost you the whole sowing.

When the seedlings have a few true leaves (their first proper leaves, about 2–3 weeks after sowing), pull out the weakest so the ones left stand about 10–15 cm apart — a hand-width (across your palm, about 10 cm) along the row.

Keep the strongest, sturdiest seedlings; take out the thin, weak and crowded ones.

Thin when the soil is damp — the seedlings you keep are disturbed less and settle straight back.

Don't waste the thinnings — the young pulled seedlings are good to eat, so they are your very first harvest.

Start weeding from about a week after sowing, as soon as you can tell the crop rows from the weeds.

Pull weeds by hand close to the seedlings — spider-plant roots are shallow, and a hoe swung too near will slice them.

Weed when the soil is damp so weeds come up roots and all; a weed just chopped at the top grows straight back.

Take care not to trample or bury the tiny seedlings as you work.

Once the crop is thinned and weeded (about 2–3 weeks after sowing), give a light first feed of nitrogen or well-rotted manure. Your recommendation gives the amount.

Lay it in a thin band along the row, about a hand-width (10 cm) to the side of the plants — not touching the stems or leaves.

Feed onto damp soil and water it in, so it reaches the roots instead of gassing off into the air or scorching the crop.

Keep fertiliser off the leaves — grains stuck on wet leaves burn them, and those leaves are what you eat.

From about 3 weeks after sowing, and again after each later cut, scatter a light top-dressing of nitrogen (or well-rotted manure) along the rows. Your recommendation gives the amount — split it into small feeds rather than one big one.

Put it on damp soil and water it in, so it feeds the roots and doesn't gas away into the air.

Keep the fertiliser off the wet leaves — it scorches them, and those leaves are what you eat.

Wash your hands after handling fertiliser, and keep it away from food, water and children.

Twice a week (every 3–4 days), walk the bed and look closely at the growing tips and the undersides of leaves on plants here and there.

Cabbage aphid: look for grey-green, powdery (mealy) clusters packed on the shoot tips and leaf undersides, with curling, yellowing leaves and sticky honeydew (the sugary droplets they leave) that grows a black sooty mould. They love cool, dry weather. Act when colonies sit on the growing tips, or about 1 in 10–20 plants is infested: squash or wash out the first small colonies at once, or spray with soapy water, wetting the undersides and tips well.

Bagrada bug: look for a small black, shield-shaped stink bug with orange-and-white markings on seedlings and around the plant base, and pale, scorched star-burst patches where it has fed; badly-hit young plants go stunted or grow no tip. Any bugs on seedlings, or fresh star-burst marks on 1 in 10 young plants → act: hand-pick them in the cool morning, clear away nearby cabbage-family weeds (wild mustards and the like) that shelter them, and spot-spray the plant base only if you must.

Flea beetle: look for tiny shiny beetles that jump like fleas when you disturb them, and lots of little round 'shot-holes' peppering the leaves like a sieve. Seedlings suffer most. More than 2–3 fresh holes per leaf, or wilting seedlings → act.

Note what you find and where. If any pest is over these levels, act now — wash off aphids, hand-pick bugs, or spot-spray just the affected patch — and open that pest's guide for the full how-to.

Take the first cut when plants are about 20 cm tall — a hand-span (thumb-tip to little-finger-tip, fingers spread) — with plenty of tender leaf, roughly 4–6 weeks after sowing.

Pinch or snip out the top few centimetres of each main shoot — the tender tip and young leaves. This makes the plant branch into many shoots.

Pinch off any flower buds you see at the same time. Early flowering (bolting) stops leaf growth; nipping the buds keeps the plant leafy.

Harvest in the cool of the morning — the leaf is crisp then and keeps longer. Handle it gently; it bruises and wilts fast.

Cut again every 1–2 weeks, taking the young leaves and tender shoot tips and leaving enough lower leaf for the plant to keep growing.

Each time, pinch out every flower bud you can see. This is the key to a long harvest — flowering (bolting) is what ends it.

Feed and water between cuts: a light nitrogen or manure feed and steady moisture drive the next flush of tender leaf. A thirsty, hungry plant bolts and turns bitter.

Keep cutting in the cool morning, and use or preserve the leaf quickly — it wilts within hours of picking.