Imperial (F1) Broccoli Seed
Quick Facts
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Latin Name
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Brassica oleracea var. italica
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Days To Maturity
Days To Maturity
Average number of days from seeding date to harvest, within a specific crop group. If a transplanted crop: average number of days from transplant date. Not sure if crop is direct-seeded or transplanted? Check the Growing Information box for details. If crop can be both direct-seeded or transplanted, days to maturity refers to direct seeding. Days to maturity for all flowers and herbs is calculated from seeding date.
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66 Days
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Life Cycle
Life Cycle
Plants can be Annuals (single growing season), Perennials (grow year after year), Tender Perennials (grow year after year in warmer climates; and in some cases when given special protection in colder climates), or Biennials (require two years to mature).
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Annual
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Hybrid Status
Hybrid Status
Hybrid: The offspring of a cross between two or more distinct parent lines, usually of same species, and selected for improved traits.
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Open-pollinated: A non-hybrid variety that can reproduce itself in kind, demonstrating relatively stable traits from one generation to the next. -
Hybrid (F1)
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Product Features
Product Features
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Heat Tolerant
- Heat Tolerant
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Imperial (F1) Broccoli Seed
Excellent heat tolerance.
Heads are dark green with small, attractive beads. Best suited for harvest in summer and early fall in areas with long days and moderate heat. However, it also is grown for late-fall harvest in California and Arizona. Imperial grows slowly in cold weather.Specs:
Quick Facts
-
Latin Name
-
Brassica oleracea var. italica
-
Days To Maturity
Days To Maturity
Average number of days from seeding date to harvest, within a specific crop group. If a transplanted crop: average number of days from transplant date. Not sure if crop is direct-seeded or transplanted? Check the Growing Information box for details. If crop can be both direct-seeded or transplanted, days to maturity refers to direct seeding. Days to maturity for all flowers and herbs is calculated from seeding date.
Close
-
66 Days
-
Life Cycle
Life Cycle
Plants can be Annuals (single growing season), Perennials (grow year after year), Tender Perennials (grow year after year in warmer climates; and in some cases when given special protection in colder climates), or Biennials (require two years to mature).
Close -
Annual
-
Hybrid Status
Hybrid Status
Hybrid: The offspring of a cross between two or more distinct parent lines, usually of same species, and selected for improved traits.
Close
Open-pollinated: A non-hybrid variety that can reproduce itself in kind, demonstrating relatively stable traits from one generation to the next. -
Hybrid (F1)
-
Product Features
Product Features
-
Heat Tolerant
- Heat Tolerant
-
-
- This product does not ship to the following countries: United Arab Emirates, Austria, Australia, Barbados, Belgium, Bulgaria, Bermuda, Bahamas, Switzerland, Cyprus, Czech Republic, Germany, Denmark, Estonia, Spain, Finland, France, United Kingdom, Greece, Hong Kong, Croatia, Hungary, Ireland, Iceland, Italy, Japan, Republic of Korea, Kuwait, Cayman Islands, Lithuania, Luxembourg, Latvia, Malta, Netherlands, Norway, New Zealand, Oman, Poland, Portugal, Qatar, Romania, Saudi Arabia, Sweden, Singapore, Slovenia, Slovakia, San Marino, Thailand, Trinidad and Tobago, Taiwan, Ukraine.
SCIENTIFIC NAME:
Brassica oleraceaCULTURE:
Broccoli prefers a well-drained, fertile soil that is high in organic matter with a pH of 6.0–7.5. A consistent supply of moisture throughout the growing season is important; irrigate regularly for best results. While more heat-tolerant varieties are now on the market, broccoli does not generally do well in hot weather. The best success is with spring and fall crops.DAYS TO MATURITY:
From date of transplanting; add about 20 days if direct seeding.EARLY SPRING CROP:
Use early and midseason varieties. Sow 2 seeds per cell in 72-cell plug flats, 3–4 seeds/in. in 20 row flats, or in outdoor beds ¼" deep. Seedlings should be ready to transplant in 3–4 weeks. If possible keep soil temperature 75–80°F (24–27°C) until germination, then reduce air temperature to about 60°F (16°C). Ensure good air circulation and light. Transplant outdoors 10–18" apart in rows 18–36" apart. Broccoli prefers cooler growing temperatures, between 55–75°F (13–24°C), optimum being 60–70°F (16–21°C), but will produce good crops under warmer, summer conditions.FALL CROP:
Use midseason and storage varieties. Start seedlings as above in May and transplant to the garden in June–July. To ensure mature heads, seed the crop early in areas where heavy freezes occur early in fall.WINTER CROP:
Successful broccoli crops can be grown where winters are mild (temperatures rarely below 32°F [0°C]). Transplants can be set out from September to February in these regions.DIRECT SEEDING:
Sow 3 seeds per foot, ½" deep, rows 18–36" apart, thinning to one plant in each group.AVG. DIRECT SEEDING RATE:
1,000 seeds/333' at 3 seeds per foot, 49,800 seeds (avg. 8.3 oz.)/acre spaced 7" apart in rows 18" apart.INSECT PESTS:
Repel flea beetles and root maggots on young seedlings by covering with floating row covers from day of planting. Treat flea beetles with insecticides such as pyrethrin or azadirachtin if heavy pressure is observed. For cabbage worms and loopers, use Bacillus thuringiensis. Cutworm prevention: Cultivate soil 2–4 weeks before planting to work in cover crops and destroy weeds.DISEASES:
Adhere strictly to a preventive program including: (1) long crop rotations with non-brassica crops, (2) clean starting mixes and outdoor seedbeds, and (3) strict sanitation practices. Johnny's Selected Seeds only sells seed lots of broccoli that have tested negative for black rot (Xanthomonas campestris pv. campestris) and black leg (Phoma lingam). NOTE: A disease-free test result means that in the sample tested, the pathogen targeted was not found. It does not guarantee a seed lot to be disease-free. However, no method of seed treatment can positively insure freedom from disease. We are glad to help with specific questions.HARVEST:
Before flower buds open, cut center head. Hydrocool or ice as soon as possible. Harvest secondary side shoots regularly to encourage continued production.STORAGE:
Store at 32°F (0°C), 95–98% relative humidity, with good air circulation for 10–14 days.SIZED SEEDS:
"Sized" seeds have been sorted so they are roughly the same size. This consistency allows for more accurate spacing with mechanical seeders and more even germination. Broccoli seeds are sized, except when noted in the product description.TYPICAL PLANT POPULATION:
43,560 plants/acre (1 sq.ft./plant) spaced 8" apart in rows 18" apart.TRANSPLANTS:
Avg. 850 plants/1,000 seeds.SEEDS/LB.:
52,900–142,100 (avg. 104,100).PACKET:
100 seeds, sows 50'.Johnny's is committed to your success, every step of the way.
We want you, our customer, to be 100% satisfied with all of our seeds, tools, and supplies.
If anything you purchase from us proves unsatisfactory, we will either replace the item or refund the purchase price.