Alliums When Do They Flower. Allium plants produce big round softball sized flowers in shades of purple. One of the best things about alliums is that most animals especially deer find the taste unappealing and won t nibble on the leaves.
The flowers last for weeks and seem to hover over the garden like balloons. Loved by bees they bear beautiful pompom flowers in shades of purple pink and white and look fantastic when planted in large groups. Herbaceous alliums such as millennium are available as plants during spring and summer.
The purple sensation allium bridges the gap between spring and early summer flowering perennials.
Occasionally they need dividing after a few years when you start to notice a decrease in flower production usually this pertains to those with small bulbs. However there are a few varieties that bloom later in the season even well into fall. Purple sensation s sturdy stems rise 24 to 30 high so the flowers appear to float above the foliage of newly emerging perennials. Herbaceous alliums such as millennium are available as plants during spring and summer.
