Why topsoil dryness can be misleading

Dry soil at the surface does not always mean a plant needs water. This is a common reason Indian balcony gardeners overwater — the top looks dry, so they add water, even though deeper soil is moist.

What's happening

Lower layers may hold plenty of moisture while the top centimetre feels parched. In pots deeper than 15 cm, surface and bottom moisture can differ significantly. The roots that matter most sit in the middle and lower sections.

Why this happens

Evaporation hits surface layers first. On a sunny balcony, topsoil dries within an hour, especially in terracotta. Wind on open terraces speeds this up. Deeper soil stays damp for days, particularly in plastic pots.

What usually helps

Check moisture at root level. Push a finger 2-3 cm deep, or insert a wooden chopstick — if soil clings to it and feels cool, deeper layers are moist. Lifting the pot works too: a watered pot feels noticeably heavier.

What to expect next

Once you check deeper moisture, you will likely water less often — and plants will respond with steadier, healthier growth.