Spring Frosts: 5 Ways to Save Your Seedlings When the Temperature Drops

April and May can be tricky: the sun warms the ground during the day, but at night, temperatures can suddenly drop below freezing. For young, tender tomato or pepper seedlings, even -1°C (30°F) can be fatal. But don't panic — there are proven methods to shield your plants from the cold.

1. Agrofiber and Plastic Wrap

This is the most reliable option. Cover your garden beds with 2-3 layers of white agrofiber. Important: the material should not touch the leaves, so it is better to drape it over hoops or a frame. Plastic wrap also works, but it must be removed in the morning as soon as the sun comes out, otherwise, the plants will "overheat."

2. Plastic "Cloches"

For individual plants, cut-off 5-liter plastic bottles are perfect. Place one over each seedling, slightly pushing it into the soil. This creates a mini-greenhouse effect that traps the earth's natural warmth around the roots.

3. Watering Before Frost

It sounds paradoxical, but moist soil holds and releases heat better than dry soil. If you generously water your beds with warm water in the evening, the moisture will evaporate throughout the night, creating a protective "curtain" of steam that prevents the temperature near the ground from hitting critical lows.

4. Smoking (Traditional Method)

If you have a large plot, you can arrange piles of damp hay or branches on the windward side. The smoke from such a fire creates a dense blanket that slows down heat loss from the soil. However, this method requires you to be present throughout the night.

Tip from AgroPlanner

Use our planner to identify the most vulnerable zones in your garden. Plants in open, windy areas suffer from frost first. Place heat-loving crops behind fences or near building walls, which absorb heat during the day and release it at night.