From about mid-April to the arrival of the monsoon in late June or early July, much of North India has afternoons above 40°C and days that touch 45°C, often with the hot, dry loo wind. Delhi NCR, Jaipur, Lucknow, Chandigarh and the plains in between all get some version of it. A balcony in that weather is harder on plants than the open ground: tiles and walls soak up heat and radiate it back into the pots all evening.
1. Shade comes first
Most plants that burn in May would be fine with a few hours less direct sun. Put up a 50% green shade net (the kind nurseries use) over the afternoon side of the balcony from April to June. It costs a few hundred rupees and does more than any amount of extra watering. Move ferns, peace lilies, calatheas and money plants away from west-facing railings entirely. Sun-lovers like bougainvillea, hibiscus, adenium, portulaca and most succulents can stay in the sun, but even they do better with afternoon shade in a 45°C week.
2. Water deeply, early, and check small pots twice
- Water between about 6 and 8 am, until water runs out of the drainage hole. The plant then has the whole morning to take it up before the heat.
- Check small pots (under 6 inches) and hanging baskets again in the evening. In peak heat they often need a second watering.
- Don't water in the midday sun: most of it evaporates, and cold water on hot roots stresses the plant.
- Water the soil, not the leaves. Misting does little in dry heat.
The finger test still applies: if the soil an inch down is damp, the pot is fine. Heat makes people overwater large pots that were never dry.
3. Keep the roots cool
- Get pots off the floor. Tiles and terrace concrete can be far hotter than the air. A wooden plank, bricks or pot feet help.
- Move pots away from walls that face the afternoon sun; the wall keeps heating them after sunset.
- Mulch. A layer of dry leaves, coconut husk (coco chips) or straw on the soil slows drying a lot.
- Double-pot black plastic pots inside a larger terracotta or ceramic pot, or wrap them in jute. Thin black plastic in full sun cooks the roots.
- Group pots together so they shade each other and hold a little humidity.
4. What not to do in the heat
Don't repot, prune hard or fertilise between April and the first rains: a stressed plant can't use the food and new roots won't grow into hot soil. Don't buy new plants for the balcony in May if you can help it; they arrive from a shaded nursery and burn in the first week. And don't panic at some leaf drop: many plants shed leaves to cope with heat and recover once the monsoon arrives.
5. Signs your plant is struggling
- Crisp, brown leaf edges or bleached patches: too much sun. Add shade.
- Wilting at 3 pm that recovers by evening: normal heat stress, not always thirst. Check the soil before watering again.
- Wilting in the morning with dry soil: real thirst. Water slowly, twice, so it soaks in instead of running down the gaps between dry soil and pot.
- Soil pulling away from the sides of the pot: it has dried out completely. Stand the pot in a bucket of water for 20 minutes.
If you travel in May or June
This is the hardest season to leave plants alone. Even with shade and mulch, small sunny pots may not last more than a day or two, and self-watering setups run out much faster than their packaging says (see our honest self-watering comparison). Before a trip, move every pot you can into indoor light or deep shade, water deeply, and group them. For anything longer than a long weekend, plan for someone to water every 2-3 days, and daily for small pots left outside. Our travel planning guide has visit counts for every season, and the Delhi NCR guide covers the city's heat, smog and winter in more detail.
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