It’s Christmas again, and most of our green roof plants have finished flowering, but in the eternal search for the longest flowering season possible I will undertake the 2016 review of our longest flowering species.
Again the Helianthemum nummularium has been the star, holding out well into November.
A slight surprise was a small sprig of flowering Thymus serpyllum peeping out from one of our oldest test rigs (5 years old).
On the nursery Bellis perennis, Armeria maritima, Dianthus deltoides and of course Primula veris are still have a go at flowering in particularly in the mild spells.
These species have been consistent performers year on year, and I would certainly recommend their inclusion in almost any green roof design. It may be a coincidence that they are also low growing varieties, and therefore excellent choices for roofs that require high biodiversity support and visual appeal without too much maintenance.
