Plant the bulbs at a depth of roughly 3 4 times the size of the bulb.
Planting allium bulbs.
They hate waterlogged soil.
Plant allium bulbs in the fall they bloom in spring.
U003c p u003e allium sonoma collection.
Planting in the ground.
Alliums will grow perfectly well in a well drained soil.
Doing so can improve drainage conditions.
Alliums are amongst the most undemanding flower bulbs to plant tolerating most types of soil and hardy down to zone 4.
15cm apart but smaller bulbs can be spaced about 10cm apart.
Plant dormant allium bulbs in the fall according to your growing zone.
The planting depth should be two to three times the diameter of the bulbs.
6 8 apart 4 8 deep.
Consider spreading a 2 inch 5 cm layer of agricultural grit or spent compost at the bottom of the hole before laying the bulb inside.
3 atropurpureum bulbs 10 nigrum bulbs.
How to grow alliums.
So if you have a two inch bulb you would plant it four to six inches deep water them well after planting.
Space larger bulbs approx.
Plant them at a depth of 2 3 times their diameter 4 6 in a well drained sunny or partly shaded site.
When planting multiple allium bulbs the bulbs should be spaced 6 to 8 inches 15 to 20 cm apart.
Plant this allium bulb collection and you will be so excited for next summer you won t want to wait.
Usda hardiness zone 3 8 full sun well draining soil.
Once after planting moderately in spring.
When to plant them.
Allium planting guide when.
These ornamental onions are bold and architectural with large rounded heads of usually purple flowers followed by attractive seedheads.
They should be planted in fall between september and november before the soil freezes.
You will rarely have to worry about watering them as they actually prefer dry conditions.
Plant bulbs in fall for a spring bloom.
Then cross your fingers and wait for spring.