The Nabhi method: one rule, four pillars and a crown

By Sudharshan Katra Padmanabha (KP) · First published 23 October 2026

Why grow your own food

We are all gardeners by nature, and by ancestry. Our grandparents, and theirs before them, grew much of what they ate. Most of us in the city have lost the habit, not the ability.

Homegrown food gives a satisfaction that nothing bought can match. You know how the plant was cared for, what went into its soil, and that no chemical ever touched it. I have always wanted more people to have that. The Nabhi method is how I set out to make it easy.

Why plants in grow bags struggle

I started where most people start: plants in grow bags. They grew, but they did not thrive unless I tended them constantly. A bag of soil dries out in a hot week, drowns when watered anxiously, and runs out of food long before the plant has given its best. To get anything decent from it, I would have had to care for it every single day.

That is not how our ancestors grew food, and it is not how a busy person can grow it either. So I spent two years, on my own terrace and on our farm, working out a better way.

I ran trials side by side:

• Farmyard manure mixed with soil, on its own
• Logs buried in the bag, on their own
• Korean Natural Farming cultures, tried in different places
• Compost alone, in different preparations

Each trial taught me something. The clearest lesson was how much healthier soil becomes as organic matter builds up in it, and that no single input does the whole job. What worked was a combination, each part doing what the others cannot. That combination is the Nabhi method.

More on this: Why most terrace plants die of watering, not pests.

What “Nabhi” means

Nabhi is the navel. Before we are born, everything we need reaches us through the cord at the navel: water, food, protection. We do nothing to ask for it.

A plant raised on the Nabhi method is cared for the same way. Everything it needs is built into the bag around it, and released as the plant asks for it. That is why there is only one thing left for you to do:

Refill the olla. Nothing else.

No watering schedule, no feeding calendar, no daily worry.

The four pillars and the crown at a glance

The method rests on four pillars, each caring for the plant on a different clock, with a crown of mulch protecting all of them.

Take away any one and the others strain to cover for it. Together, they leave the plant wanting for nothing.

How an olla waters your plants

The olla is the nabhi itself, the centre everything grows from. It is an unglazed clay pot, made for us by a local potter, holding 2 to 3 litres of water. It sits buried in the bag with only its neck and lid above the surface.

Water seeps through the porous clay at the rate the surrounding soil pulls it: quickly when the soil is dry, barely at all when it is moist. The plant drinks on demand. You cannot overwater it, and it will not dry out while there is water in the olla.

How often you refill depends on where the bag stands, the heat and the humidity, so there is no fixed schedule. Lift the lid, look, and top it up when it runs low.

By the time a plant reaches you, its roots have already grown down to the olla. It works from the day it arrives.

More on the olla: What is an olla? A 2,000-year-old way to water.

Hot compost: food the plant can use right away

A young plant needs food it can use right away. Our compost provides it, and we make every batch ourselves.

It starts with farmyard manure from desi cows, brought to life with ghanajeevamrutha, made by Subhash Palekar's method and activated in water with pure jaggery. Once the core of the heap climbs past 60 °C (140 °F), we mix in chopped weeds and fresh green material. The heap is shaped into cones about 3 feet wide and 3 feet tall, which holds the core between 65 and 71 °C (150 to 160 °F).

We check the temperature constantly. Whenever it falls below 60 °C, usually every two or three days, the heap is turned to feed it fresh air. We repeat this until the heat no longer rises, then leave the compost to cure for about 15 days, until it is at room temperature all the way through.

That sustained heat is the point. Heat-loving bacteria do the work, and the temperature kills weed seeds and disease-causing organisms. What is left is clean, rich compost with nutrients ready for the plant to take up.

See the heap, the forest cultures and every bag being built on Instagram.

More on compost: Hot compost: food a plant can use right away.

Indigenous microorganisms: a living soil network

Healthy soil is alive. Fine threads of beneficial fungi run through it, linking with roots and helping them reach water and nutrients the roots could not reach alone. A bag of ordinary soil has little of this life. We bring it in from the forest.

We place half-boiled, non-sticky rice in a mud pot, cover it, and leave it under a bamboo clump or a sweet fruit tree such as sitaphal or jamun. In about three days, white fungi from the forest floor have colonised the rice. We bring it back, mix it with an equal weight of chemical-free jaggery, and store it in glass or porcelain, where the fungi go dormant within a week. Kept this way, the culture lasts up to six months.

To wake it, we dilute it heavily in water and pour it over organically grown paddy husk, spread in a low mound on farm soil and covered with a wet gunny bag. Over five days, kept moist and turned once, the fungi spread through the husk.

Finally, we blend garden soil with our hot compost, mix in the colonised husk, and let it rest for a week. This is our potting mix: compost for quick food, and a living fungal network for the months ahead.

More on IMO: Indigenous microorganisms: bringing the forest floor into a grow bag.

Hugelkultur in a grow bag: the aged-wood base

Hugelkultur is the old practice of building a garden bed over buried wood. As the wood breaks down, it acts like a sponge, holding water through a hot spell and releasing nutrients slowly, over years rather than weeks. It gives the bag its long-term stability.

The kind of wood matters. We use only wood from native plants that grow naturally in the area, in sticks 2 to 3 inches thick. Most of ours come from last year's farm huts, aged in the weather and already partly broken down by termites. Wood can also be weathered on bare ground or stacked on a stone.

Using well-aged wood avoids the classic first-year hugelkultur problem. Fresh wood takes nitrogen from the soil as it starts to rot, leaving young plants hungry and yellow. Aged wood is past that stage, and feeds the plant instead.

More on the hugel base: Hugelkultur in a grow bag: why aged wood, not fresh.

Why mulch matters in a grow bag

If the four pillars feed the plant, the mulch protects all of them. It is the crown of the method.

We use cut dry wild grass, mostly from the roofs of last year's huts, with the flower heads removed so no seeds can sprout. These grasses break down very slowly, often staying good for a year or more. We lay at least 3 inches, so that only the olla's lid shows through.

The mulch does several jobs at once:

• Shields the soil life below from harsh sun
• Holds moisture in the soil instead of letting it escape from the surface
• Builds and protects soil structure as it slowly breaks down
• Stops weeds from germinating
• Prevents rain splash, which carries soil onto the undersides of leaves and spreads disease in many vegetable plants

We also pull any weeds that appear in the first week or two, before the plant leaves us. You never need to top up the mulch while your plant is growing. Only when its life is over and you want to replant the bag does it need refreshing.

More on mulch: Mulch: why bare soil isn't clean, and why it's the crown of our method.

How a Nabhi grow bag is built, layer by layer

Every bag is built by hand, in this order, from the bottom up:

1. A first layer of potting mix, enough to hold the wood upright.
2. The hugel sticks: four or five pieces of aged wood, cut 6 to 8 inches long, stood vertically in the mix.
3. Chopped dry leaves and grasses over the wood.
4. The olla, filled with water first, so its weight keeps it steady and any tilt shows before the bag is finished.
5. More potting mix around the olla, up to 2 inches below its rim, with the plant set in.
6. The mulch crown, at least 3 inches deep, until only the olla's lid can be seen.

The plant then grows on in this bag, at our nursery, until its roots have reached the olla and it is established, before it ever comes to you.

Caring for a Nabhi grow bag

One thing: keep water in the olla. No watering the surface, no fertiliser, no feeding schedule, no weeding. The bag has already been built to take care of the rest.

When a plant comes to the natural end of its life, the bag does not have to. Refresh the mulch and the top layer, and it is ready for the next plant.

Results from our trials

In one of our trials, a tomato plant transplanted in August grew well into its fruiting season by October without a single refill of its olla. Those were monsoon months, and rain helped. Even so, it is exactly the kind of forgiveness the method is built for: weeks of a busy life without a thought for the plant, and still a harvest.

Questions people ask

Plants raised on the Nabhi method

Every full-size plant we sell is raised on the Nabhi method, using natural farming practices: no synthetic fertiliser and no chemical pesticide at any stage. (We say natural farming rather than organic because organic is a certified term in India, and we do not hold that certification.)

• Fruiting Vegetables 10 plants
• Gourds & Melons 8 plants
• Beans & Pods 4 plants
• Cool-Season Vegetables 5 plants

Our forefathers grew their own food. With a plant given the right start, and a bag that takes care of it, so can you.

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