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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Johnny's Exclusive
Beautiful dark green pac choi, best at full size, suitable for minis.
Beautiful dark green pac choi, best at full size, suitable for minis.
45 Days
Johnny's Exclusive
Heat tolerant dark green butterhead with broad disease resistance.
Heat tolerant dark green butterhead with broad disease resistance.
48 Days
Dark green, compact romaine for an all-season mid-size.
Dark green, compact romaine for an all-season mid-size.
46 Days
Impressive flavor for a summer-harvested carrot.
Impressive flavor for a summer-harvested carrot.
70 Days
Excellent heat tolerance and smooth, well-domed, very attractive heads.
Excellent heat tolerance and smooth, well-domed, very attractive heads.
57 Days
Very slow bolting, broadleaf mustard.
Very slow bolting, broadleaf mustard.
21 baby; 45 full size
Heat loving salad and stir-fry green with mild Swiss chard flavor.
Heat loving salad and stir-fry green with mild Swiss chard flavor.
50 baby; 85 full size
Heat-tolerant romaine for long, uniform hearts with good flavor.
Heat-tolerant romaine for long, uniform hearts with good flavor.
58 Days
Heat tolerant, full-size romaine.
Heat tolerant, full-size romaine.
57 Days
Early, heat-tolerant standard variety.
Early, heat-tolerant standard variety.
21 baby; 38 full size
Bolt-, heat-, cold-tolerant pac choi for full or medium-size heads.
Bolt-, heat-, cold-tolerant pac choi for full or medium-size heads.
45 Days
Fast-growing blonde romaine for baby leaf and full-size heads.
Fast-growing blonde romaine for baby leaf and full-size heads.
29 baby
Exceptionally sweet, early cauliflower.
Exceptionally sweet, early cauliflower.
42 Days
Bright green leaves form dense, closed heads.
Bright green leaves form dense, closed heads.
48 Days
Most adaptable butterhead with excellent flavor and texture.
Most adaptable butterhead with excellent flavor and texture.
47 Days
Heat tolerant, full-size romaine.
Heat tolerant, full-size romaine.
57 Days
Standard heat-tolerant green leaf with disease resistance.
Standard heat-tolerant green leaf with disease resistance.
52 Days
Johnny's Exclusive
Large, bright green oakleaf with dense heads and long harvest window.
Large, bright green oakleaf with dense heads and long harvest window.
48 Days