Heading broccoli close to harvest
Broccoli is a member of the very large Brassica family with four different types that can be grown in the home vegetable garden.
This is the type most frequently available in supermarkets and when growing broccoli in the home garden. It has a single large domed head that is composed of numerous clustered florets, 4-8 inches (10-20 cm) diameter.
Photo Right - This type is usually green in color and arranged in a tree like fashion on branches sprouting from a thick, edible stalk.Mouse over image to enlarge.
Photo Right - Many varieties of this type will yield over an extended period by developing small side heads, 1-2 inches (2-5 cm) in diameter after the central head has been harvested.Mouse over image to enlarge.
Photo Right - Sprouting broccoli heads are not as large as the heading type but there are a lots more of them and they usually produce over an extended period. Mouse over image to enlarge.
|Veggie Garden Dairy|
|Also Known As|
|Botanical||Family - Brassicaceae, Species - Brassica oleracea , Cultivar group - Italica Group|
|Plant Type||Cool season annual - flowering vegetable|
|Frost Tolerance||Semi Hardy|
|Planting Position||Sunny position but welcomes shade in the hottest part of the season - requiring a minimum of 3-4 hours of direct sunlight daily.|
|Seed Viability||3 years|
|Germination||5-7 days at 50-80 F (10-27 C)|
|Growing Temp||55-75 F (13-24 C)|
|Seed to Transplant||5 - 7 weeks|
|Planting Method||Direct sow or Seedling transplants|
|When to Plant||Spring and again in mid-summer for fall-winter harvest|
|Time to Plant||As early as 1 - 2 weeks before the average date of the last 32 F (0 C) freeze in the spring in your area but not before soil temperatures are consistently above 50 F (10C)|
|Seed Sowing||Direct sowing broccoli seeds - 1/2 inch (12 mm) deep - 4 inches (10 cm) apart in rows 24-30 inches (60-75 cm) apart|
|Plant Spacing||Transplant or thin seedlings 12-18 inches (30-45 cm) apart in rows 24-30 inches (60-75 cm) apart or for a grid, stagger plants 18 inches (45 cm) apart in each direction.|
|Soil Conditions||Well drained - High organic matter - Rich fertility|
|Fertilizer||High fertilizer needs, 5-6 quarts per 100 sq feet (5.5-6.6 liters per 9.3 square meters) pre-planting of all purpose organic fertilizer 5-5-5, same rate for each side dressing.|
|When to Fertilize||2 weeks before sowing or transplanting - when transplanting use liquid starter fertilizer - side-dress every 3-4 weeks - last side-dressing as the heads begin to show.|
|Days to Harvest||60-100 days - depending on conditions and variety.|