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Organic Broccoli & Cole Crops Seeds::Organic Sprouting Broccoli::Santee F1 Hybrid Sprouting Broccoli
Organic Sprouting Broccoli - Growing and Seed Saving InformationPrintable version of this page
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Sprouting Broccoli
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Sprouting
broccoli has many small shoots, rather than a single head. Most varieties
require a cold treatment, or vernalization, before making sprouts but some
modern varieties do not. Santee, the variety
we sell, does not require cold treatment to initiate bud development. Plants
grow very slowly during the fall and winter months and when temperatures
start climbing in late winter, they will start to grow again and produce
prolific amounts of small purple or white florets on long bright green leafy
stems. Florets are mild-flavored, and much sweeter and more tender than
typical fall broccoli.
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Soil and Nutrient Requirements
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Broccoli
prefers well drained fertile soils high in organic matter. It will tolerate
slightly alkaline soil. It does best in the 6.0 – 7.5 range. A general
guideline is 2-3 lbs of 8-16-16 fertilizer over 100 sq ft of garden area two
weeks before planting. If boron is not
present in your soils, consider adding 1 Tbs per 100 sq ft. If soils are heavy or tend to be wet, a
raised bed is recommended.
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Position
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Full sun.
Light shade will slow maturity.
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Seeding Depth
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1/4-1/2"
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Seeding Rate
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Every 9”
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Plant Spacing
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30”
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Row Spacing
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36”
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When to Sow
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Start
indoors 4-6 weeks before planting date. Optimal soil temperature for
germination is 65-75°F, but broccoli will germinate as low as 50°F. Plant
outside as soon as the chance of hard frost has passed. Summer varieties can be planted late spring
for a fall crop. Cold dependent varieties are more appropriate for an
over-wintering crop that can be planted in late summer in mild climates. Becky
Grube, UNH Extension, performed an over-wintering trial of sprouting broccoli
in high tunnels and had impressive marketable yields as a late winter crop.
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Other Info
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Broccoli
is shallow rooted. Be careful with even shallow cultivation.
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Frost Tolerant
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Broccoli
can take a light freeze.
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Drought Tolerant
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No.
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Heat Tolerant
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Some
varieties are more tolerant, but in general Broccoli prefers cool
temperatures.
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Seed Specs
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4,375-9,375
seeds/oz (6,000 avg), 70-150M seeds/lb (96M avg).
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Seeding Rate
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44M
plants/acre (96M seeds/acre, 1 lbs/acre), using 3 seeds/ft, 8” plant spacing,
18” row spacing. M=1,000.
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Harvest
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Shoots
are harvested in late-winter to early spring when other fresh local vegetables
are in short supply and demand is high. Shoots should be harvested while the
beads are still tight. Check fields every 2-3 days since once heads have
loosened, quality is quickly compromised. Pinch off main terminal bud when it
begins to form floret, this will increase side shoot production. Regular harvesting of side shoots will
encourage further growth. Cool broccoli immediately after harvest to retain
quality.
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Storage
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Store at
32°F for 1-2 weeks.
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Pest Info
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- Cabbage looper, imported
cabbage worm, and diamondback moth are of the Lepidoptera order and can thus be controlled by Bacillus thuringiensis (such as
Dipel DF, see Supplies) and/or spinosad (such as Entrust™),
preferentially in rotation with one another to prevent selection of
resistant individuals (check with your certifier before applying).
- Protect plants from flea
beetles by using floating row covers in the early season.
- Root maggots can be
controlled by applying beneficial nematodes.
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Disease Info
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- Black rot (Xanthomonas campestris pv.
campestris) first appears as V-shaped, yellow lesions at leaf
margin. Infected plants should be pulled up immediately, and plantings
should never be worked during wet conditions.
- Fusarium yellows, caused by
the bacteria Fusarium oxysporum
f. sp. conglutinan, manifests
as yellowing of the lower leaves 2-4 weeks after transplanting.
Yellowing moves to upper leaves and ultimately causes wilt.
- Fungal diseases can be
prevented by spraying with copper hydroxide (such as Champion WP™and/or
oxidate (such as Storox™), but are best prevented by production
practices that build soil and promote vigorous plant growth.
- Head rot of broccoli and
cauliflower, caused by several different bacterial species, can develop
quickly under conditions of high moisture and high temperature. It shows up as leaf discoloration and
decay at base of outer leaves. Head rot is prevented by production
practices that enhance air movement to promote drying, as well as
maintenance of adequate calcium and boron levels in soil.
- Clubroot is a soil borne
disease which stunts the roots of the plants so that they are not able
to develop normally. Rotate crops and add lime to raise soil pH to 7.2.
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Seed Saving
Instructions
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Insect
pollinated biennial (can work as an annual). Different broccoli varieties need
to be isolated by ¼ mile to prevent cross pollination. Barriers such as tree
lines, woods or buildings in between varieties can allow for shorter distances.
Transplant in early spring and allow plants to flower after forming a compact
head. Broccoli seed can take a very long time to mature and may require some
season extension. Gather seed stalks when seed pods are dry being careful to
prevent losses due to shattering. Use a 1/8" screen to help with cleaning.
Broccoli seed remains viable for 5 years under cool and dry storage conditions.
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