RHS Plants
RHS Plants

Shop

Information & Help

My account

Acacia dealbata

mimosa

RHS award of garden merit
Product Image
Fluffy yellow, lightly scented ball-shaped flowers cover the ends of the branches from winter to spring. An evergreen tree with a pale green trunk and large, feathery glaucous leaves, which emerge with a purple flush.

This mimosa (or wattle) makes an ideal conservatory plant - while in warmer gardens, it can be planted in a sheltered spot against a south-facing wall.

Acacia dealbata will never reach the magnitude of those in its native Australia but it can grow to 12m (40ft) in 20 years, so it does need plenty of room in the garden.

How to care for Acacia dealbata:

Plant in a sunny, sheltered position with free-draining soil, and avoid exposed or frost-prone areas. Dig in plenty of well-rotted compost or organic matter at planting time and stake the tree firmly to prevent wind rock.

Water regularly during dry spells while the tree establishes. Once flowering has finished, lightly prune to remove shoots that spoil the shape of the tree.

Protect young trees from frost with fleece in colder areas.
Flowering period:
  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec
Eventual height:
15m
Eventual spread:
6m
Position:

Full sun

Rate of growth:

Fast-growing

Soil:

Moderately fertile, moist, well-drained soil

Hardiness:

Borderline hardy (will need protection in winter in colder areas)

Product options

1
Delivery options (pick your preferred option at checkout)
Standard Delivery£12.99

Goes well with
Add to wishlist

nasturtium - Tropaeolum majus 'Black Velvet' (Tom Thumb Series)

nasturtium

£2.69  £2.15
View details
Add to wishlist

Crocus tommasinianus 'Barr's Purple'

species crocus bulbs

From £5.59
View options
Add to wishlist

Narcissus 'Martinette'

tazetta daffodil bulbs

From £4.79
View options
Add to wishlist

Water irrigation bag for trees

£17.99
View details
Add to wishlist

Daphne odora 'Aureomarginata'

daphne

From £29.99
View options
Add to wishlist

Billardiera heterophylla 'Ultra Blue' (PBR)

bluebell creeper (syn. Sollya heterophylla Ultra Blue)

£29.99
View details
Add to wishlist

Helleborus × hybridus 'First Dance' (Wedding Party Series)

Lenten rose hellebore

From £12.99
View options
Add to wishlist

Helleborus × hybridus 'True Love' (Wedding Party Series)

Lenten rose hellebore

From £12.99
View options
Add to wishlist

Premium tree planting kit with softwood stake

£20.95
View details
Add to wishlist

Essential tree planting kit with bamboo stake

£13.97
View details
Become an RHS Member today and save 25% on your first year
Join now

Keep in touch

View our Privacy Policy
Contact us
Cookies
Terms
Privacy

© RHS Enterprises Limited 2026
Registered in England & Wales No. 01211648. | VAT No. GB461532757 | Registered Office: 80 Vincent Square, London, SW1P 2PE.

All sales help fund the charitable work of the RHS.