Green Glow Nursery
How to Fertilise Fruit Plants
A simple month-by-month feeding calendar for Indian conditions, how to apply fertiliser without burning roots, and how to read deficiency signs.
A plant in open ground can send roots out to find what it needs. A plant in a pot can only eat what you give it, in a volume of soil that is exhausted within months. Feeding matters far more in containers — and so does not overdoing it.
Fertiliser for Fruit Plants: The Basics
What the three numbers mean
Every fertiliser pack carries an N-P-K ratio. In practical terms:
- N (nitrogen) drives leaves and green growth. Too much gives you a lush plant that refuses to fruit.
- P (phosphorus) supports roots, flowering and fruit set.
- K (potassium) governs fruit quality, sweetness and general hardiness.
This explains the most common feeding mistake in Indian gardens: heavy urea. Urea is almost pure nitrogen, so it produces a big leafy plant with no flowers. If your mango is thriving but never blooms, excess nitrogen is the first thing to suspect.
A simple feeding calendar
This suits most fruit plants in pots across India. Adjust timing by a few weeks for your region.
| Period | What to give | Purpose |
|---|---|---|
| Feb–Mar | Cow dung manure or vermicompost, 1–2 handfuls worked into the top layer | Wakes the plant for the growing season |
| Apr–Jun | Balanced NPK (19:19:19) monthly, at half the label strength | Supports active growth |
| Jul–Aug | Little or nothing during heavy rain | Feed washes straight out of a saturated pot |
| Sep–Oct | Compost, plus bone meal or a high-P/K feed | Builds flower buds for next season |
| Nov–Jan | Nothing | Growth slows; feeding now is wasted and can harm |
Add a handful of neem cake two or three times a year to discourage soil pests, and an occasional dose of Epsom salt (one teaspoon in a litre of water) if older leaves yellow between the veins — a common magnesium shortfall in pots.
Organic or chemical?
Both work. Organic inputs — compost, vermicompost, cow dung, bone meal, neem cake — release slowly, improve soil structure and are almost impossible to overdose. They are the safer default, especially for anyone new to fruit plants.
Chemical fertilisers act fast and are useful for correcting a specific deficiency, but they do nothing for soil structure and burn roots easily. If you use them, always at half the recommended strength, and always onto already-damp soil.
How to apply without burning roots
- Water first. Never apply fertiliser to dry soil — concentrated salts against dry roots cause burn.
- Keep it off the stem. Spread granules or manure in a ring around the pot edge, not heaped against the trunk.
- Work it in lightly with a fork or your fingers, then water again.
- Feed in the cool of the morning or evening, never in midday heat.
When not to feed
Feeding is not medicine. A struggling plant usually has a light, water or root problem, and fertiliser makes it worse by asking damaged roots to process more salts. Do not feed:
- For two to three weeks after delivery, while the plant recovers from transit
- For three to four weeks after repotting — fresh mix already carries nutrition
- While a plant is visibly wilting, or suspected of root rot
- Through deep winter, when the plant is barely growing
Reading deficiency signs
| What you see | Likely cause | What to do |
|---|---|---|
| Older, lower leaves yellowing evenly | Nitrogen shortage | Vermicompost or a balanced feed |
| New leaves yellow, veins stay green | Iron, locked up by alkaline soil | Chelated iron; add organic matter |
| Older leaves yellow between veins | Magnesium | Epsom salt solution |
| Leaf edges browning and crisping | Potassium, or fertiliser burn | Flush the pot well, then feed lightly |
| Lots of leaves, no flowers | Excess nitrogen | Stop nitrogen; switch to high P and K |
Common questions
Why is my mango plant not flowering?
The usual causes, in order: too much nitrogen, not enough direct sun, or simply age — a grafted mango typically needs two to four years before it flowers. Cut nitrogen, ensure six or more hours of sun, and feed phosphorus and potassium from September.
Can I use kitchen waste directly?
Not raw. Fresh scraps buried in a pot rot anaerobically, attract pests and can generate heat that damages roots. Compost them separately first, then add the finished compost.
I over-fertilised. What now?
Flush the pot immediately — run water through it slowly for several minutes so excess salts wash out of the drainage holes. Repeat the next day, keep the plant in shade, and do not feed again for at least a month.
Next: pruning for early fruiting. See also soil and potting mix.