How to Grow Scotch Broom
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Scotch Broom
Cytisus scoparius
shrubScotch broom is a deciduous to semi-evergreen shrub native to Europe, known for its bright yellow, pea-like flowers that cover the plant in spring. It grows vigorously and can reach 6-10 feet tall, making it popular in ornamental landscapes. The plant is also considered invasive in many regions due to its aggressive spreading and nitrogen-fixing abilities.
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Example Scotch Broom timeline · Pittsburgh, PA (Zone 6b)
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Plant Scotch 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 Scotch Broom
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Scotch Broom dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5b-9b; most vigorous in zones 6-8
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Get my Scotch Broom timeline →Growth Stages
Seedling
3-4 weeksTiny green seedlings with simple leaves emerge from soil. Early growth is slow but steady.
Keep soil lightly moist but not waterlogged. Provide bright light. Thin seedlings to prevent damping off.
Vegetative Growth
1-2 yearsYoung shrub develops multiple green stems with small compound leaves. Plant gradually increases in height and width.
Water during dry periods. Do not fertilize heavily. Light pruning after first year to encourage bushiness. Minimal maintenance needed.
Flowering
4-6 weeksIn spring (April-May in northern regions), branches become covered with bright yellow, pea-like flowers arranged along green stems. Some cultivars may have pink or orange flowers.
Do not prune during blooming. Allow flowers to set seed if desired. Deadhead spent flowers to extend blooming if desired, though not necessary.
Seed Development & Summer Growth
8-10 weeksAfter flowering, small green seed pods develop and mature to brown by late summer. Plant may produce soft new growth in summer.
Allow seed pods to mature on plant. Light summer watering during drought. Avoid heavy nitrogen fertilizer.
Dormancy & Fall/Winter
4-6 monthsPlant may lose some or all leaves depending on winter severity and variety. Stems remain green throughout winter; plant retains ornamental structure.
No watering needed unless drought occurs. Do not prune in late fall (reduces hardiness). Can be pruned in late winter before new growth if size control desired.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, spray with water or insecticidal soap. Rarely serious outdoors.
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Spray with horticultural oil in early spring before growth begins. Prune heavily infested branches.
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Prune and destroy affected stems. Generally not a serious problem.
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and
Plants are generally deer-resistant but young growth may be browsed. Use fencing if necessary.
Uses
Spring Garden Display
OrnamentalThe bright yellow flowers provide stunning spring color in landscapes, blooming for 4-6 weeks. Popular in coastal and Mediterranean-style gardens. [source]
Cut Flowers & Arrangements
HouseholdFlowering stems make excellent long-lasting cut flowers for spring bouquets and floral arrangements, lasting 1-2 weeks in water. [source]
Traditional Broom Making
CraftHistorically, Scotch broom twigs were used to make brooms and brushes, hence its common name. The flexible stems bundle tightly for effective sweeping tools. [source]
Pollinator Support
WildlifeThe abundant spring flowers attract bees, butterflies, and other pollinators, providing important early-season nectar and pollen sources. [source]
Traditional Herbal Uses
MedicinalIn European folk medicine, broom flowers and tops have been used traditionally for various remedies, including diuretic preparations and cardiovascular tonics. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Scotch broom is not harvested for food or traditional crops. For ornamental purposes, cut flowering stems in spring for fresh arrangements. Seeds can be collected from mature seed pods in late summer if desired for propagation, though the plant self-seeds readily. Note: Many regions consider this plant invasive; check local regulations before collecting seeds.
Fun Facts
- 🌱 The plant gets its name from its historic use: brooms were made by binding the flexible stems together. King Henry VIII had a brooch made from broom flowers, and the plant became the symbol of the House of Plantagenet (from 'planta genista,' its Latin name).
- 🌱 Scotch broom is nitrogen-fixing, meaning it partners with soil bacteria to convert atmospheric nitrogen into usable plant nutrients—this ability makes it an excellent pioneer plant for poor soils but also contributes to its invasiveness and ability to outcompete other vegetation.
- 🌱 The plant can produce up to 3,000 seeds per plant that remain viable in soil for up to 30 years, making it extremely difficult to eradicate once established in an area. Many states and countries have declared it a noxious invasive weed.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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