Malabar Spinach Growing Schedule: What to Do From Sowing to First Frost

How the season is shaped

This crop runs on heat, so its calendar is the mirror image of true spinach. Nothing happens until the soil is warm, growth is slow for the first month, and then from midsummer the vine accelerates and produces more than most households can eat until cold weather stops it. Understanding that shape stops you panicking in the slow weeks and stops you being caught out by the fast ones.

There are only four moments where a decision matters. Sowing into soil that is genuinely warm; getting the support up before the vine needs it; pinching to make it branch; and starting to strip flower spikes as the days shorten. Everything else is watering, feeding and picking on repeat.

The whole cycle takes roughly seven to nine weeks from sowing to first harvest, and then produces for three to four months. If your summers are long and hot, one sowing is genuinely all you need.

Before and at sowing

The work that matters happens before the seed goes in. Choose the sunniest position you have, because this plant will take full sun all day in heat that scorches other greens. Dig two to three inches (5 to 8 cm) of well-rotted compost into the bed a fortnight ahead, and put the support up while the ground is still empty and easy to work in.

Then wait for warmth. This is the single most common mistake: sowing on the same date as everything else in spring and getting nothing. Cold wet soil rots this seed rather than germinating it. Take a morning soil temperature reading two inches (5 cm) down and hold off until it stays above 65F (18C).

1. Build the trellis first Six to eight feet (1.8 to 2.4 m) of netting or vertical strings on braced posts, driven a foot (30 cm) into the ground. Doing this before sowing means never trying to work a post in around established roots.
2. Feed the ground, not the plant Two to three inches (5 to 8 cm) of well-rotted compost dug in two weeks ahead gives this heavy leaf producer a base to work from. Fresh manure is not suitable; it will still be breaking down when the roots reach it.
3. Wait for the soil, not the date Read the soil at two inches (5 cm) depth in the morning for three days running. Sow when it holds above 65F (18C). Every week you wait for warm soil you get back twice over in growth rate.
4. Treat the seed and sow Soak twenty-four hours or nick the coat and soak two hours, then sow half an inch (1 cm) deep, two seeds per station, stations a foot (30 cm) apart. Firm the soil and keep the surface damp until emergence.

In a short season, start seed in pots on a heat mat three to four weeks before your soil will be warm, and set the plants out once nights hold above 55F (13C).

The growing months

The first month after emergence looks disappointing. The seedling makes a few thick leaves and appears to do nothing while it builds roots. Do not respond by feeding heavily or by assuming it has failed. Keep the soil evenly moist, keep slugs off it, and tuck the first long shoot into the netting by hand so it learns where to go.

Once it starts climbing, everything changes pace. Pinch the tip at about a foot (30 cm) to force branching, begin a balanced liquid feed every two to three weeks, and mulch two inches (5 cm) deep over the root zone. From then on the routine is a deep soak twice a week in hot weather, more often in containers, and a weekly picking of shoot tips that doubles as pruning.

Late summer brings the one change of task. As the days shorten, flower spikes appear, and each one that ripens becomes purple berries that stain hard surfaces and seed the bed heavily. Take a minute each time you pick to snap the spikes off. It keeps the leaves coming for several weeks longer and saves the weeding next year.

Closing the season and setting up the next one

The end comes quickly. There is no gradual decline of the kind you get with hardier crops: growth stops as nights cool into the 40s F, and the first frost destroys the plant outright. Take your final big harvest when the cold nights start rather than gambling on another warm spell.

Then clear properly. Cut the vine down, take it off the bed, and rake up the berries that have fallen, because this plant self-seeds far more heavily than people expect and volunteers will come up through whatever you plant there next summer. If you want your own seed, pick a few ripe berries into a jar, squash them, rinse the seed clean and dry it thoroughly before storing.

Finally, write the season down while you still remember it. Four dates and two notes are enough, and they are worth more the second and third year than any general advice, because they are measured in your own garden.

1. Record the four dates Sowing date with the soil temperature, emergence date, first harvest date, and the date the vine finished. Those four numbers tell you next year whether to sow earlier, later, or grow fewer plants.
2. Note the flowering week and the position of each plant The week flowering began tells you when to start stripping spikes next season. Marking where each plant stood tells you which seedlings next summer are volunteers you did not want.
3. Save seed deliberately or not at all Pick ripe berries into a jar, mash, rinse the hard seed clean of the purple pulp and dry it for a week before storing somewhere cool and dark. Leaving berries to fall is not seed saving, it is next year's weeding.
4. Plan the rotation Move the bed next year, particularly if the roots came up with swollen galls on them. Two or three years before this crop returns to the same ground keeps nematode pressure down.

Volunteers are easy to pull when they are two leaves tall and hard work once they have started to climb. One pass over the bed in early summer is all it takes.