I have a design (so far in my head) for a solar dryer. The simple version is simply hanging things under the roof of conservatory (or nearest you have) but this is a version for placing in the garden for maximum effect. It relies on the ability of a black-painted surface to absorb sunheat by day and give off heat at night (if you have a lean-to greenhouse, painting the wall it leans to black does the same thing, I think they call it a Trobe wall, but not sure of the spelling). The dryer has a twin-wall polycarbonate roof (but if you can get hold of a no-longer-wanted double-glazing panel so much the better), and a mesh floor on which the food rests, with plenty of ventilation (but not too much draught) and some black-painted bricks at the base. I am going to have to experiment with depths and ratios of ventilation to insulation when I can actually get to build it. If you want SUN dried, it might be a good cheat.....

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Flowers come in too many colours to see the world in black-and-white.