How to Grow Broom
iNaturalist
Broom
Cytisus scoparius
shrubBroom is a deciduous to semi-evergreen shrub known for its vibrant yellow (or sometimes bi-colored) flowers that bloom profusely in spring. It produces slender, angular green stems that remain ornamental even after flowering, and develops small pea-like flowers typical of the legume family. This vigorous grower is popular in landscapes for its low-maintenance nature and ability to thrive in poor soils.
When should you plant Broom in your zone?
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Example Broom timeline · Pittsburgh, PA (Zone 6b)
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Plant Broom
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 Broom
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Broom dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-9, with best performance in zones 6-8
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Get my Broom timeline →Growth Stages
Seedling
4-6 weeksTiny green shoots emerge with cotyledons; very delicate with minimal leaf development
Keep soil consistently moist but not waterlogged. Provide bright, indirect light. Harden off before transplanting outdoors.
Establishment (Year 1)
6-12 monthsSlender, upright stems develop with small compound leaves; plant focuses on root development
Water regularly during dry spells. Stake if needed for support in windy locations. Minimal fertilizer needed; avoid nitrogen-rich fertilizers.
Vegetative Growth (Year 2)
6-12 monthsShrub expands in size with dense, angular green stems; bush becomes fuller and more structured
Prune after flowering to encourage bushier growth and remove dead wood. Water moderately; reduce watering as plant matures.
Flowering
4-8 weeksAbundant bright yellow pea-like flowers cover the stems in spring (March-May); flowers appear in clusters along green branches
Do not fertilize during flowering period. Enjoy blooms and ensure good air circulation. Deadheading extends flowering but is optional.
Post-Flowering & Maturity
8+ months until next flowering cycleFlowers fade and are replaced by small seed pods; green stems remain ornamental throughout summer and fall
Prune within a few weeks of flowering to maintain shape and prevent legginess. Remove one-third of old growth annually. Reduce watering in late summer.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity with regular misting in dry conditions. Prune affected areas. Spray with neem oil or insecticidal soap if severe.
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Spray with water to dislodge. Use insecticidal soap or neem oil for heavy infestations. Encourage natural predators like ladybugs.
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Remove affected leaves. Use yellow sticky traps. Spray with neem oil or horticultural oil if population is high.
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Ensure excellent drainage; avoid overwatering. Remove and dispose of affected plants. Treat soil with fungicide if necessary.
Uses
Ornamental landscaping and cut flowers
HouseholdBroom is valued for its spectacular spring flowers and attractive green stems year-round, making it ideal for rock gardens, borders, and Mediterranean-style landscapes. Flowering stems are excellent for fresh cut flower arrangements. [source]
Traditional herbal remedy
MedicinalHistorically used in herbal medicine to treat heart and circulatory conditions. The alkaloid sparteine found in broom has been studied for cardiac properties, though modern medical use is limited. [source]
Pollinator support
WildlifeBroom flowers attract bees and other pollinators, making it valuable for supporting early-season pollinator populations when few other spring flowers are available. [source]
Dried flower arrangements
CraftThe delicate green stems and dried flower clusters work beautifully in dried arrangements, providing texture and color for long-lasting designs. [source]
Erosion control and poor soil stabilization
HouseholdBeing nitrogen-fixing and drought-tolerant, broom is effective for stabilizing sandy or poor soils and controlling erosion on slopes and difficult sites. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Broom is primarily grown as an ornamental shrub and is not harvested for food. However, flowering stems can be cut for fresh arrangements in spring. Cut stems in the morning after dew dries. For arrangements, remove lower leaves and split stem ends to promote water uptake. Flowers last 1-2 weeks in water.
Fun Facts
- 🌱 The common name 'Broom' comes from its historical use—dried bundles of stems were actually bound together and used as sweeping brooms.
- 🌱 Broom is nitrogen-fixing through its association with beneficial soil bacteria, allowing it to thrive in very poor, infertile soils where most plants struggle.
- 🌱 The plant is considered invasive in some regions, particularly in parts of California and the Pacific Northwest, where it can outcompete native vegetation; check local regulations before planting.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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