How to Grow Genista
Genista lydia
Genista lydia (Lydian Broom) is a compact, mound-forming shrub that smothers itself in bright yellow flowers each late spring. Plant in full sun in any poor, well-drained soil — chalk, sand, or gravel all suit it perfectly. Water until established, then leave it alone; it is drought-tolerant once settled. The critical rule is pruning: only ever tip-prune the green growth immediately after flowering. Never cut into old bare wood — it will not regrow and the branch will die. No feeding needed.
Yearly Lifecycle
Care Essentials
Rarely if ever. Genista thrives on poor soils and over-feeding produces soft, leggy growth at the expense of flowers. A very light balanced feed in spring on extremely impoverished soil is the maximum.
Watch For
- Die-back after pruning into old wood — the most common mistake
- Gall mites causing distorted shoot tips
- Drought stress in containers
Care Requirements
Light
Full sun
Needs at least 6 hours of direct sun daily. Tolerates very light shade but flowers poorly and becomes leggy in shadier spots. Ideal for hot, south-facing banks and slopes.
Watering
Low — drought-tolerant once established
Water newly planted genista regularly for the first season until roots are established. After that, it is highly drought-tolerant and needs no supplemental watering except in extreme prolonged drought.
Fertilizing
None needed
Genista is a nitrogen-fixing legume. Feeding is unnecessary and counterproductive, encouraging soft, weak, floppy growth at the expense of flowering. It thrives on the poorest soils.
Pruning
Tip-prune after flowering only; NEVER into old wood
Immediately after flowering (June), lightly trim the current season's green growth. This is all the pruning needed. Never cut into old bare wood — it will not regenerate and the affected branch will die. Hard pruning kills this plant.
Spacing
80–100 cm apart
Space plants 80–100 cm apart to allow the naturally arching, spreading habit to develop. Genista lydia spreads wider than it is tall, forming attractive ground-covering mounds.
Support
None needed
Genista lydia is a naturally low, spreading, self-supporting shrub. No staking, tying, or support of any kind is needed.
Growing Tips
Never cut into old wood
Genista resents hard pruning. Only ever tip-prune the current season's green growth after flowering. Old bare wood will not regenerate — cutting into it kills branches permanently.
Poor soil is perfect
Genista is a legume and fixes its own nitrogen. Rich soil or feeding encourages soft, floppy growth and fewer flowers. Gravel, chalk, and sandy soils are ideal.
Ideal for dry sunny spots
A perfect choice for hot, dry banks, south-facing slopes, gravel gardens, and rockeries where other plants struggle. Extremely drought-tolerant once established.
