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Sweet peas are the classic annual climber and look just as lovely in pots as they do in a border. 'Spencer Mix' has large flowers and long stems, good for cutting, but 'Cupani' and 'Painted Lady' are particularly good as their short stems give good coverage of the support and the...

Learn how to pinch out and pot on sweet peas with Sarah Raven's step-by-step video guide.springMore advice on growing flowersGrowing sweet peas from seedGrowing lupinsHow to create a cut flower patchPlanting out cerinthes

A deficiency in plant chlorophyll, resulting in pale green, yellow or yellow/white foliage.

Having soft, greyish white hairs, usually on foliage.

Striped pale or white banding on a dark background, ie, Miscanthus zebrinus.

A microscopic worm of the family Nematoda, that resembles white cotton thread. May enter plant tissue and cause rotting.

Pertaining to iris flowers, which have a base colour of white or yellow, with stippled or feathered edges of a contrasting colours.

Refers to foliage having patches of different colours, usually as a result of the chlorophyll content. Common combinations are green with cream, white or silver, although some plants produce foliage that mix green with reds and yellows.

These miniscule sap-sucking insects multiply rapidly on leaves. Large colonies are immediately evident, as are the symptoms - silvery-white discoloration of the leaves and distorted shoot tips and buds.Packed clusters of tiny white insects on leaves

and there may also be white fungal growth.Spots on the leaves, fringed yellow-orange, possibly with white fungal growth beneath. Some spots might be white, others brown, surrounded by papery tissue. When the centres fall out, the leaf ends up peppered with holes