I don’t have it but was curious about it… When I looked on the High Country Garden site it said it was a sport of A. multibulbosum so, if you found that one weedy, I think you should be very wary of this one! Personally I’ve found all the alliums I’ve tried are weed problems so I don’t try any others now! :-)

Several alliums are listed as being sterile--Millennium for one, I believe.

Not a seeder or spreader...one of the reasons it is very spendy at around £6 per bulb. Therefore Ignored by me. Personally, I don't grow many alliums...but when and where I do, I want lots of them, so am perfectly happy with a forest of plain old chives and Purple Sensation or sphaeralcephalon colonising areas between the ramblers. One thing I will say about (most) seedy alliums - they tend to stay fairly contained (unlike many, many other far less welcome volunteers). Obvs, I would be less sanguine about a.triqueterum (three cornered leek), mind) Spellings may be dubious.

thanks everyone

rosaprimula, good point, I did check on the website, 10 bulbs for 35 Euro, well, that is the strongest argument that it is not a weedy spreader or bulb producer, I had overlooked the price before - ahem

sports do funny things sometimes, there is a cultivar or sport of the Crocus tommasinianus, the plain species is seeding freely,

Ruby-something is sterile, very showy in the flower and has to be propagated via bulbs...

and costs a fortune also.

so, I will ponder my garden budget and perhaps order some, the rest of the Silver spring sounds great,

have a nice Sunday,

yours,

Lin

One thing I will say about (most) seedy alliums - they tend to stay fairly contained (unlike many, many other far less welcome volunteers).

That may well be your experience @rosaprimula UK (Cambridge) Z8/9 but it reminded me of the "horror story" that a gardener friend of mine relayed to me earlier this year. She bought this allium

https://www.brecksbulbs.ca/product/hair-allium

And she has rued the day that she ever planted it as it has turned up all over the place. She says it has been impossible to remove it.

Grief, that's actually horrible. I wouldn't buy 1 of them. I have alliums in 3 places at the allotment, with a mix of aforementioned varieties including some mega chive called Quattro or something like...and none of them have ever really spread beyond their respective borders, even after years and years of afflatunense...although the original dozen bulbs now number over a 100 under the ramblers and clematis. Even the really seedy three cornered leek has mainly stayed in one long border (one of my customers gardens).

Opinion: Allium seed is fairly large and heavy and unless extreme winds or water move it, it won't go far.