How to Grow Sunburst Broomcorn
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Sunburst Broomcorn
Sorghum bicolor subsp. technicum
grassSunburst broomcorn is a tall ornamental and functional grain sorghum variety grown primarily for its distinctive golden-yellow bristle-like panicles used in broom and brush making. The plants reach 6-8 feet tall with sturdy stalks and produce characteristic brush-like seed heads that have been used for centuries in traditional broom crafting. It's an heirloom variety prized for both its decorative appearance and practical utility.
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Example Sunburst Broomcorn timeline · Pittsburgh, PA (Zone 6b)
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Plant Sunburst Broomcorn
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Sunburst Broomcorn
Around Aug 15≈ 120 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9, can be grown in zone 4 with long growing seasons
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Germination & Seedling
2-3 weeksSeeds sprout within 7-10 days, developing into seedlings with 2-3 leaves. Plants are small and vulnerable.
Keep soil consistently moist but not waterlogged. Thin seedlings to proper spacing. Protect from birds and strong winds.
Vegetative Growth
4-6 weeksPlants develop multiple leaves and sturdy stalks, growing rapidly. Characteristic leaf blades are long and narrow, typical of sorghum.
Water regularly, provide full sun. Apply balanced fertilizer at mid-season. Support tall varieties if windy. Weed control is important in early stages.
Tillering & Stem Elongation
3-4 weeksPlants produce additional shoots and stem height increases significantly. Plants may reach 3-4 feet tall during this period.
Ensure consistent moisture and nutrient availability. Remove any weak or diseased shoots. Monitor for pests.
Flowering & Panicle Development
3-4 weeksSeed heads emerge from the top of plants, initially compact and green, gradually lengthening and developing characteristic brush-like appearance.
Water moderately; reduce fertilizer. Do not disturb plants during this critical stage. Watch for bird damage.
Maturation & Harvest
2-3 weeksPanicles turn golden-yellow and bristles become stiff and fully developed. Seeds mature inside the brush structure. Plants begin to dry.
Cease watering to promote drying. Harvest when panicles are fully golden and dry to touch. Cut just below the seed head.
Common Pests
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Plant resistant varieties; early planting can avoid peak midge populations; destroy crop residue after harvest
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Remove affected foliage; use Bt (Bacillus thuringiensis) sprays; encourage natural predators
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Install bird netting or reflective materials; use scare tactics; harvest promptly when seed heads mature
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Encourage natural predators; use neem oil spray if severe; remove nearby vegetation where they hide
Uses
Broom and Brush Making
CraftSunburst broomcorn is the traditional primary material for crafting natural brooms and brushes. The stiff, fine bristles are ideal for sweeping and have been used in broom-making for centuries. [source]
Dried Flower Arrangements
HouseholdThe distinctive golden-yellow seed heads make striking additions to dried flower arrangements, wreaths, and fall/autumn decorations. Their tall stature and unique form add visual interest to indoor displays. [source]
Grain & Bird Feed
CulinaryWhile broomcorn varieties are primarily grown for fiber, the seeds can be used as birdseed or ground into flour for limited culinary purposes in traditional cooking. [source]
Wildlife Habitat & Food
WildlifeBroomcorn plants provide excellent food and shelter for wildlife, including birds and beneficial insects. The mature seed heads are a valuable winter food source for songbirds. [source]
Thatching & Fiber Arts
CraftBeyond brooms, broomcorn bristles have been used in weaving, basketry, and traditional thatching applications. The fiber is durable and flexible enough for various handcraft projects. [source]
Harvest Tips
Harvest when panicles are fully golden-yellow and bristles are stiff and dry, typically 120-150 days after planting. Cut the seed head 6-8 inches below the panicle using sharp shears or a knife. Dry completely indoors (2-3 weeks) in a well-ventilated area before storing or crafting. Store in a cool, dry place protected from moisture and rodents.
Fun Facts
- 🌱 Broomcorn was extensively grown in the American Midwest during the 1800s and early 1900s, with Illinois becoming the 'Broom Corn Capital of the World,' though cultivation has since declined significantly due to synthetic broom production.
- 🌱 Despite its name, broomcorn is not actually corn—it's a variety of grain sorghum (Sorghum bicolor) and is more closely related to grains like millet and wheat than to maize.
- 🌱 A single mature broomcorn plant can produce enough bristles to make several brooms, and in traditional broom-making, a single broom might contain bristles from 8-10 different panicles.
Gardening Terms
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