Growing Microgreens in an AC Room — The Easy Way Through Indian Summers

✍️ Sonia Pardasani, Founder BageechaBox | 🕐 4 min read | ❄️ Grow Guide

Quick answer: An AC room is the easiest way to grow microgreens through an Indian summer. Keeping the room around 22–26°C puts most varieties in their comfort zone — even cool-weather greens like peas and broccoli. The catch: AC air is dry, so trays dry out faster. Keep trays out of the direct airflow, check moisture daily, and give them light from a window or a grow light.

Every summer in Delhi I move my home trays into an air-conditioned room, and growers in Hyderabad, Ahmedabad, Nagpur and Chennai can do exactly the same. It turns the hardest growing months into some of the easiest.

Why AC Rooms Work

• Steady temperature: our seed timings are based on 20–30°C, and an AC room keeps you inside that range
• Lower humidity: AC removes moisture from the air, which reduces mould risk
• More varieties: peas, broccoli, kale and spinach become possible even in May

Setting Up, Step by Step

Step 1 — Set the right temperature

Around 22–26°C works for most varieties. Very cold settings slow growth down.

Step 2 — Keep trays out of the airflow

Never place trays directly under or in front of the AC vent. The cold, dry blast dries the surface and can stunt seedlings. A shelf on the opposite side of the room is ideal.

Step 3 — Check moisture every day

AC air is dry. Lift the tray daily and bottom water when it feels light. See our cocopeat drying guide.

Step 4 — Give them light

AC rooms often have curtains drawn. After the dark period, put trays near a bright window or under a full-spectrum LED grow light, otherwise stems grow pale and leggy.

Step 5 — Tell the calculator your room temperature

In our Seed Calculator, enter the room temperature, not the weather outside, so timings match your setup.

What If the AC Only Runs at Night?

That still helps. Trays recover overnight, and daytime temperatures inside a closed room are usually far below terrace or balcony temperatures. Choose faster varieties like moong, radish and methi so each tray spends fewer days exposed to heat.

Frequently Asked Questions

Q: Can microgreens grow in an AC room?

Yes, very well. Around 22–26°C suits most varieties. Keep trays out of the direct airflow and give them light after the dark period.

Q: Why are my microgreens drying out in the AC room?

AC air is dry, and trays near the vent lose moisture fastest. Move them away from the airflow and check moisture daily.

Q: Which microgreens can I grow in summer with AC?

Almost all of them — including cool-weather varieties like peas, broccoli, kale and spinach that struggle outdoors in summer.

Q: Do I need a grow light in an AC room?

Only if the room is dim. A bright window is enough; otherwise a full-spectrum LED grow light keeps stems sturdy and green.