Hi,

I want to put some pots (geraniums, and a passion flower) into a large
coldframe (130cm x 86cm, 60cm High) for the winter. Can anyone give me some
advice on heating the coldframe to protect against frost?

I was thinking of either a paraffin anti frost heater, or an electric tube
type. If i get an electric tube type how do i know what wattage to go for?

Thanks,

Simon