How temperature affects plant growth

Temperature is one of the most overlooked factors in indoor plant care. In Indian homes with scorching summers and AC-cooled rooms, plants often struggle without owners realising the cause.

What's happening

Most houseplants thrive between 18-30°C. Outside this range, growth slows, leaves curl or brown, and the plant becomes vulnerable. Indian summer balconies exceed 45°C, roasting roots. AC rooms drop to 16-18°C with low humidity, stressing tropical species.

Why this happens

Plant enzymes work only in a moderate range. Extreme heat speeds water loss faster than roots replace it. Cold slows chemical reactions and weakens defences against fungal infections common in humid Indian cities.

What usually helps

On hot balconies, raise pots off the floor with stands or bricks to avoid tile heat. Group pots and mulch soil with coconut husk chips. In AC rooms, keep plants away from direct airflow—along the far wall or near the door.

What to expect next

Growth stabilises in a week or two of buffering temperature extremes. The biggest improvement often comes from simply raising pots off a scorching balcony floor.