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from The Reids contains these words:

Have a half dead spring flowering Pieris in a pot where we sit
in summer. Thinks, whats the point of an early flowering shrub
where we cant see it from house and where late frosts ruin it?
Right, out it goes. First thought was a nice big fuschia, a quick
google didnt help much and our favourite nursery had big non
hardy bushes or dwarf hardy ones. So am I missing something? Can
I get a largeish hardy fuschia to grow in a pot in south London?
If so anyone know a good variety?

Mrs Popple and Tom Thumb are hardy ones and will both grow to 4 or 5
ft, flower thickly for months, ( large flowers iin red and purple; TT
is slightly lighter tham MP). They're terribly easy to propagate from
cuttings so start looking over your neighbourhood walls to see who you
could cadge a bit from. Usually for sale cheap in B and Q etc during
summer. However, leafless fuchsia twigs don't look great in winter and
spring.

Janet.