Posted: 09/05/2015 at 09:46
Oh lucky you - mine are growing under an apple tree, starved of light and water, but they multiply at a rate of knots. Enjoy them while you can (fingers crossed for the sunshine, then move them, or store them (Labelled) in the shed to plant again in the autumn. They're not all that good in planters - too much leaf, and as you say the flowers only open when the sun shines.
They grow in the vineyards in the Languedoc, which might indicate they need to dry out through the summer.