Planting Depth When planting allium bulbs, you want to plant them at a depth of two to three times their diameter—typically around 4 to 8 inches deep. Dig a hole that's at least twice as deep as ...

You can also grow them in pots filled with a Best Buy compost for containers as long as you plant them at the necessary depth. How late can you plant allium bulbs? When the Which? Gardening magazine ...