Featured Heat Tolerant
One of our heat tolerant lettuce varieties growing in the field.
Heat Tolerant
In our trials, we test and select varieties that can endure heat successfully. This includes heat-tolerant versions of cool-weather crops; for example, heat-tolerant lettuce, spinach, broccoli, and kale varieties that can help keep you in greens throughout the hot summer months. We also seek out highly heat-tolerant versions of warm-weather crops, such as heat-tolerant tomatoes with the ability to set fruit even during the summer heat of southern growing zones. Choose from a large assortment of heat-tolerant vegetable seed varieties to fill your seasonal planting slots. Not sure of what to choose for your growing zone? Our customer service team is ready to help.
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Casey Butterhead Lettuce (Boston)
Improved butterhead for CEA summer slot.
Improved butterhead for CEA summer slot.
55 Days
The most heat tolerant lettuce.
The most heat tolerant lettuce.
50 Days
Extra early and refined.
Extra early and refined.
21 Days
Heat-tolerant organic variety that produces high-quality roots.
Heat-tolerant organic variety that produces high-quality roots.
22 Days
Johnny's Exclusive
Nabechan Bunching Onions
Better flavor than other bunching onions, sweeter and more complex.
Better flavor than other bunching onions, sweeter and more complex.
60 Days
Early, heat-tolerant standard variety.
Early, heat-tolerant standard variety.
21 baby; 38 full size
Heat tolerant, full-size romaine.
Heat tolerant, full-size romaine.
57 Days
Excellent heat tolerance and smooth, well-domed, very attractive heads.
Excellent heat tolerance and smooth, well-domed, very attractive heads.
57 Days
Johnny's Exclusive
Adriana Butterhead Lettuce (Boston)
Heat tolerant dark green butterhead with broad disease resistance.
Heat tolerant dark green butterhead with broad disease resistance.
48 Days
Darkest red leaves with long harvest window and good flavor.
Darkest red leaves with long harvest window and good flavor.
48 Days
Impressive flavor for a summer-harvested carrot.
Impressive flavor for a summer-harvested carrot.
70 Days
Dark green, compact romaine for an all-season mid-size.
Dark green, compact romaine for an all-season mid-size.
46 Days
Darkest red leaves with long harvest window and good flavor.
Darkest red leaves with long harvest window and good flavor.
48 Days
Heat tolerant dark green butterhead with broad disease resistance.
Heat tolerant dark green butterhead with broad disease resistance.
48 Days
Large and fancy, heat tolerant red butterhead for stunning display.
Large and fancy, heat tolerant red butterhead for stunning display.
48 Days
A red Summer Crisp with good flavor.
A red Summer Crisp with good flavor.
48 Days
Early, heat-tolerant standard variety.
Early, heat-tolerant standard variety.
21 baby; 38 full size
Bulky and uniform white-stemmed pac choi for mini or full-size heads.
Bulky and uniform white-stemmed pac choi for mini or full-size heads.
52 Days
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