Ailsa Craig Onion: 95 days. Long day type. Very well-known globe-shaped heirloom onion that reaches really huge size--5 lbs is rather common! The skin is a pale yellow and the flesh is relatively mild and sweet, so is recommended for fresh use—not a storage type. Introduced in 1887 by David Murray, gardener for the Marquis of Ailsa, at Culzean Castle in Maybole, South Ayrshire, Scotland. Contains approx. 100 heirloom seeds