I have some aquilegia 'Green Apples' Seedlings that I've been growing on a windowsill since last Autumn , so about four months or so. I haven't fed them as such, apart from the compost they went into when they were pricked out into individual pots. They are a couple of inches tall now and being watered when necessary. I'm wondering when they'll be ready for a liquid feed and more importantly when they can be put into the garden. I know that they're hardy but I assume they must be a certain size before they can stand up to the elements, or is it just a matter of waiting for spring to arrive ?.