Posted: 23/08/2013 at 10:52
Be careful what you wish for! I have just removed three compost sacks full of Allium ostrowskianum aka farreri and other names too. It is the small purple one which often comes in the packs of mixed small Alliums.
All Alliums of the common types (common as in easily obtained) have the potential to be seed weeds if you are not careful. I have a huge bank of Allium karatviense Ivory Queen, all from self sown seeds.
If only some of the Californain ones would seed like that!
Oh and many of the Alliums sold as Gladiator are not what they claim to be. Still nice tall purple/blue things though.