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
Large, bright green oakleaf with dense heads and long harvest window.
Large, bright green oakleaf with dense heads and long harvest window.
48 Days
AAS (All-America Selections) Winners
Our spiciest green mustard.
Our spiciest green mustard.
21 baby; 45 full size
Uniform red leaf with heat tolerance and heavy heads of frilly leaves.
Uniform red leaf with heat tolerance and heavy heads of frilly leaves.
55 Days
Heat loving, frost sensitive green with mild Swiss chard taste.
Heat loving, frost sensitive green with mild Swiss chard taste.
50 baby; 85 full size
Our most attractive green leaf lettuce.
Our most attractive green leaf lettuce.
53 Days
Dark green, compact romaine for an all-season mid-size.
Dark green, compact romaine for an all-season mid-size.
46 Days
Most adaptable butterhead with excellent flavor and texture.
Most adaptable butterhead with excellent flavor and texture.
47 Days
Bolt tolerant, widely adaptable with open habit suited for heads.
Bolt tolerant, widely adaptable with open habit suited for heads.
58 Days
Standard heat-tolerant green leaf with disease resistance.
Standard heat-tolerant green leaf with disease resistance.
52 Days
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
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
Bolt tolerant, widely adaptable with open habit suited for heads.
Bolt tolerant, widely adaptable with open habit suited for heads.
58 Days
Colorful heat-tolerant spinach alternative.
Colorful heat-tolerant spinach alternative.
28 baby; 40 full size
Standard heat-tolerant green leaf with disease resistance.
Standard heat-tolerant green leaf with disease resistance.
52 Days
Succulent golden-green leaves, orange stems, and mild, crisp flavor.
Succulent golden-green leaves, orange stems, and mild, crisp flavor.
50 Days
Johnny's Exclusive
Dark red and green, deeply lobed leaves.
Dark red and green, deeply lobed leaves.
21 baby; 45 full size
Bright green leaves form dense, closed heads.
Bright green leaves form dense, closed heads.
48 Days
Known as "Red Callaloo" in the Caribbean, comparable to spinach in taste.
Known as "Red Callaloo" in the Caribbean, comparable to spinach in taste.
50 Days