It is easy to think that garden plants are protected simply because they are within a tended area, unlike their wild cousins.
However, garden plants do go out of cultivation and once that happens they are lost forever - whatever their medical, horticultural or scientific value.
The conservation charity, Plant Heritage, does its best to keep rare plants in cultivation.
The Grampian and Tayside branch raises money for this purpose.
Revenue from the local branch’s annual plant sale is really important to conservation.
A spokesman said: “And our plant sale might well be really important to you if you want some unusual or rare plants for your garden.
“You are invited to come along to the Myre Car Park, Forfar this Saturday, April 26, for great plants at low prices, advice on their cultivation and an exciting ‘horticultural’ raffle.”
Doors will be open at 10.30 a.m.