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covella

ornamental allium multiplying

covella
18 years ago

Can anyone tell me which ornamental alliums do not multiply invasively? I have A. christophii and A. Mt. Everest which are very tame - a few offsets some years and slowly multiplying. I was told that A. Moly will multiply just like chives and would be everywhere - I just hate how much work that is to yank out - or dig one at a time.

Here are the ones I'm interested in from the Van Engelen catalog:

Allium azureum - blue, June

Allium cowanii - white, May blooming

Allium flavum - Small Yellow Onion June/July

Allium ostrowskianum, Syn: A. oreophilum - pink May/June

Allium pulchellum, Syn: A. carinatum, red-violet June/July

Allium triquetrum white May to July

Allium schubertii - purple May/June

Allium sphaerocephalon - purple Syn: The Drumstick Allium. "Great naturalizer with dense, crimson-purple, egg-shaped flowers". July - does naturalize mean a larger clump or takes over the world with seed?

I have a significant deer population and am working on adding alliums to my beds instead of lilies. Van Englelen has a good selection and their 2005 catalog will be posted in May - trying to plan ahead. I'm going to cross-post to the perennials forum. Thanks!

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