Colours of the sea and sky
In the Summer Garden right now we have repeats of this deep blue agapanthus in full flower, and every day I hear people talking about it. We’ve placed them amongst grasses and alongside bright yellow achillea, so it stands out a mile. This deep, dark blue is one of the more unusual varieties. Agapanthus are more often a lighter blue or white. They don’t come in anything on the red spectrum.
Agapanthus are summer bulbs from South Africa and they will make a big impact in your borders or in containers. They aren’t cheap; (I saw two bulbs in a 20cm pot for £8 the other day), but they will last for many years so they are good value in the long run.
I keep seeing them outside snazzy beach-themed holiday properties, and they have come to be an architectural flower of summer; a flowering version of a bay tree in a pot by the door. It makes sense as they are the colour of sea and sky and they work well on their own or companion planted with a variety of colours and forms – whatever takes your fancy.
They like a good soil and don’t like sitting in wet, so whether you plant them out, or in containers, incorporate grit if drainage is poor. Oh, and don’t bother with them if you only have a shaded space – they need full sun. They give interest for a long period as they go from leaves to flower to seed heads over many months. You can get evergreen varieties too for even longer interest, but they are less frost hardy than the decidiuous ones.
If you grow yours in pots, keep the pot snug to the root ball. They give better flowers when their root ball is constricted. Ours are in the ground where they form clumps and generally get on well. They are frost hardy and I don’t worry about lifting them at all. Flowering is decreased the next year if the bulbs dry out completely for a long time in the autumn. But there’s not much chance of that here on Dartmoor!
Nick Haworth, Head Gardener