NOTE

  • Without protection, all of these varieties will "winterkill" in colder climates, where winter temperatures fall consistently below 20°F/-7°C.
  • For optimal results, observe the guidelines provided in our Early-Sprouting Broccoli (#8304) and Late-Sprouting Broccoli (#8299) Production Tech Sheets.
  • Late-sprouting, aka winter-sprouting broccoli requires vernalization to produce florets. Vernalization takes place while the plant is exposed to temperatures at or below 50°F/10°C for a period of time. The cumulative amount of time the plant needs to be exposed to these temperatures to produce florets varies between varieties; a cumulative period of 6–8 weeks represents a "high" vernalization requirement.
  • DTM = Days to Maturity

Johnny's Mini Broccoli Planting Program indicates optimal transplanting and harvesting times for 10 different early-sprouting varieties, including broccoli raabs, choi sums, and broccoli x gailon types (also known as summer-sprouting broccoli); and late-sprouting varieties, including types for winter harvest and overwintering (also known as winter-sprouting broccoli).

Designed to take the guesswork out of succession planting mini and sprouting broccolis, the program allows you to easily extend your harvest across the growing seasons. Succession-plant the varieties listed in the suggested sequences to achieve a steady supply. By selecting appropriate varieties, meeting vernalization requirements where indicated, and providing protected cover where necessary, it is possible to achieve a 3–4-season harvestable yield.

Determine which mini and sprouting broccoli varieties to sow during particular seasonal slots by evaluating the transplanting and harvesting periods shown in the charts below.

Broccoli Raab & Choi Sum • Direct-Seeded
Direct-Seeding / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
DIRECT-SEEDING
HARVESTING
Features
Taxon Stem Color DTM Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Note:
Brassica rapa var. purpurea Purple 37 Short High 2–4" Unique purple-stemmed choy sum with dark green leaves and yellow flowers. Sweet mild flavor. Also known as kosaitai.
Direct-Seeding / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
DIRECT-SEEDING
DIRECT-SEEDING
HARVESTING
HARVESTING
Features
Taxon Stem Color DTM Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Note:
Brassica rapa var. chinensis Dark Green 40 Short High 2–4" Uniform, great tasting green choy sum for spring and fall planting slots.
Direct-Seeding / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
DIRECT-SEEDING
HARVESTING
Features
Taxon Stem Color DTM Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Note:
Brassica rapa var. ruvo Dark Green 42 Short Very High 4–6" Vigorous broccoli raab with versatility and adaptability. Good for single or multiple (cut-&-come-again) harvests. This type is known in Italy as cima di rapa, which translates as "turnip top."
Early-Sprouting Broccoli (aka Summer-Sprouting Broccoli) • Transplanted
Transplanting / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea var. italica x alboglabra (aka Broccoli x Gailon) Medium Green None Early / 27 Medium Long Medium 6–12" Excellent Good Improved heat tolerance, sweet flavor, and very tender stems. Great for spring, summer, and fall broccoli production. Will produce small central head unless pinched.
Transplanting / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea Bright Green Early / 33 Medium–Long High 8–15" Slender, tender stems pickable at longer length (up to 8") for easier bunching. Finely beaded florets. Fewer leaves on stems for minimal stripping at harvest. No pinching necessary.
Transplanting / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
TRANSPLANTING
HARVESTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea var. italica x alboglabra(aka Broccoli x Gailon) Dark Green None Early / 33 Medium Medium High 8–15" Good Good High-yielding variety, compact plant habit, good flavor. Will produce small central head unless pinched.
Transplanting / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
TRANSPLANTING
HARVESTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea var. italica Purple None Early-Mid / 37 Tall Short Very High 12–18" Good Good Purple-beaded, strong upright variety for main season production. Grow and harvest similar to Atlantis.
Transplanting / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
SOWING
SOWING
HARVESTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea var. italica Dark Green None Mid / 45 Large Long High 12–18" Average Good OP broccoli best known for its prolific side shoot production, but can produce good sized central heads as well. Pinching may encourage earlier and larger side shoot production.
Late-Sprouting Broccoli (aka Winter-Sprouting Broccoli) • Transplanted
Transplanting / Harvesting Period in COLD AREAS
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
HARVESTING
Transplanting / Harvesting Period in MILD AREAS
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
HARVESTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea var. italica Purple Low Late / 80–115 Large Medium High 18–24" Average Good Plant in summer for overwintering and early spring harvest in warmer climates. Plant in late spring/early summer for fall harvest in cooler climates. Available in both organic and conventional seed.
Transplanting / Harvesting Period
Cool/
Spring
Warm/
Summer
Cool/
Fall
Cold/
Winter
TRANSPLANTING
HARVESTING
Features
Taxon Stem Color Vernalization Requirement Rel. Maturity /DTM Plant Size Harvest Duration Rel. # Side Shoots /Harvest In-Row Spacing Heat Tolerance Cold Tolerance Note:
Brassica oleracea var. italica Purple High Very Late / 140 Largel Short High 18–24" Average Excellent Overwinter in milder climates for spring harvests. Plants require vernalization and will not flower in the fall before vernalization.