This popular variety allium 39summer beauty39 has a clump45forming habit which is quite different from most alliums each rhizome produces several stems and this form of ornamental onion is grown primarily for its pom45pom flowers in early summer the globular blooms are pink in colour tinged with lilac and they are loved by butterflies bees and beneficial garden insects the plant is however said to repel aphids making it a great addition to any garden including within the