Heat Tolerant Lettuce

Heat Tolerant Lettuce

Lettuce in summer has two enemies: bolting and tipburn. The heat-tolerant varieties here, about 90 of them, resist both better than average under warm days and warm nights, and they still form the head shape their type is known for. That covers butterheads like Adriana, oakleaf such as Bauer, Bluerock romaine, Salanova types like Bonarda, and crisp Batavias. Many are offered as pelleted seed for precise sowing. We picked them with the midsummer slot in mind. A variety that shines in July may not handle the swing from cool to hot in a spring planting, especially heading types, so match the variety to the season. Shade cloth, overhead cooling, and harvesting a few days early all help.

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