Summer Heat

Frost gets all the attention, but a July heat wave quietly costs most gardens more fruit than an October night ever does. These guides give you the actual temperatures, how long the heat has to hold before it matters, and what is worth doing about it. Planning the other end of the season? Start with the frost date lookup.

Dried yellow blossoms scattered where they fell across cracked pale soil, seen from ground level, with a banded sun disc low on the horizon in a bleached sky.

Summer heat

Why Are My Tomato Flowers Falling Off? It's the Heat

Tomato flowers falling off with no fruit behind them is almost always heat. Here are the temperatures that do it, how long it has to last, and what actually helps.

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