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Allium hollandicum Purple Sensation


Multiple globes of deep purple flowers in summer

Much loved by garden designers this is fabulous choice for a Mediterranean style planting scheme. This ornamental onion produces tall elegant stems of purple, globe-shaped flowers held above clumps of green, strap-shaped leaves in late spring.


Great for a container, and fabulous planted in a group or dotted through a sunny border or gravel garden.


Best in a well drained soil, that doesn't get waterlogged. Place some coarse grit in the base of the planting hole if your soil is heavy and wet in winter. Use a good quality general purpose compost for container growing and raise the pot on 'pot feet' through the winter months to help with drainage.

Alliums are lovely as dried flowers in floral decoration.

Plant details

In depth plant information

Property Value
Plant type Perennial herbaceous, Spring bulb
Flower colour
Foliage colour
Typically available February - May
Season of interest Summer
Flowering June - August
Evergreen No
Plant height 25 cm - 50 cm
Plant width 10 cm - 50 cm
Fragrant flowers No
Attracts bees No
Attracts butterflies No
Plant height in 5 years 40 cm
Hardiness zone (?) H4

Will perform best in these conditions

Property Value
Soil type Sand, Clay, Chalk, Loam
Light exposure Full sun
Soil drainage Well drained, Medium
Planting instructions

Water the plant in its pot thoroughly before planting – give it a good soaking. Prepare the area by digging a hole twice the size of the pot. Dig compost into the base of the hole. Remove the pot and position the plant in the hole, with the top of the rootball about level with the surrounding soil. Refill the planting hole with a mixture of garden soil and compost, firming as you go. Water in well and keep well watered during the plant's first year.

Planting site Gravel garden

Additional Information for Fruit, Veg and Bulbs

Property Value
Sowing September - November

Typically available

From February to May