Waltham
Broccoli · Heading / Calabrese
Heirloom
Brassica oleracea var. italica
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Brassicaceae (Mustard family) · Genus: Brassica
Characteristics
Color
Green
Flavor
Sweet
Growth Habit
Dwarf / Compact
Intended Use
Fresh / Salad
About the Plant
Life Cycle
Biennial
Harvest year 1, seeds year 2
❄
Hardiness
Cool-Season/Hardy
☀
Exposure
Full Sun
💧
Moisture
Evenly Moist
🌍
Origin
United States
🌱
Germination
4–15 days
at 40–95 °F
⏳
Days to Maturity
85–92 days
Plant Height
1 1/2–2 ft
Mature Spread
1 1/2–2 ft
Fruit Size
4–8 in
How to Plant
🏠
Start Indoors
6-8 Weeks Before Last Frost
Transplant
2-4 Weeks Before Last Frost
🌸
Direct Sow (Spring)
2-4 Weeks Before Last Frost
🍂
Direct Sow (Fall)
12-14 Weeks Before First Frost
Planting Depth
1/4–1/2 in
Seed Spacing
12–24 in
Row Spacing
24–36 in
Thin To
12–18 in
🪴
Container Friendly
Yes
🌡
Optimal Soil Temp
60–85 °F
🌡
Soil Temp
40–95 °F
🌡
Air Temp
28–80 °F
When to Plant in Your Area
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