Posted: 19/05/2015 at 18:11
We have a tiny terrace outside our kitchen door. The short version of this story is that we now lots of shelves which will hold pots, they're very strong but I don't want to tempt fate so I have opted for plastic containers to keep the weight (and the cost, come to think of it) to a minimum. The containers are troughs, measuring 70cm L, 30cm H, 25cm W with a capacity of approximately 32 litres. The majority of these are on shelves on an east-facing stone wall, a few feet up with no shadow of any kind sheltering the pots until the sun has moved behind the wall. One of the plants I would like to use is a small clematis and because I've often heard people say that clematis in containers need a little shelter around the roots I started thinking about ways of insulating them. I've read about double potting and had what may be an absurdly convoluted plan...
Rather than try to find pots which will fit inside the existing ones without sacrificing too much soil, could I plant the plants in a big grow bag, pop the grow bag inside the plastic pot with either chippings or even just some polystyrene packing sheets between the wall of the pot and the grow bag?
Is this overkill? Totally unnecessary? Or is it actually a sensible idea? I've always had a lot of container grown plants (permanent plantings of shrubs and climbers rather than annual displays) but up to now I've used thick, heavy, glazed pots. I'm a little anxious about planting up small shrubs and climbers only to lose them later on in the year.
IF this is a sensible idea, is it also going to help protect the roots in winter?