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.Acer griseum, Paper-bark maplePrunus serrula is perfect tree for small gardens. It provides year-round interest, producing small, white flowers in spring, followed by small fruits and red or yellow leaves in autumn. Its shiny bark remains a deep red throughout

There are several different viruses that affect tulips, each with slightly different symptoms. Tulip breaking virus causes streaking or marking of purple, pink and red tulips, usually on the late-flowering cultivars. White and yellow tulips aren

growing on a grassy bank. It has clear white flowers in summer and very prickly stems. I tend to hard prune some but not all, which means that we get a much longer flowering season. (The unpruned flower earlier.)This is the beginning of growth on a pear

For a short but glorious time in June oriental poppies come into their own, providing flamboyant displays to enliven borders, says Carol Klein.Most gardeners yearn for a splash of glamour, and the most flamboyant of all June's flowers has

out there that punch way, way above their weight when it comes to fragrance.As an example Sarcococca hookeriana, a sparky little evergreen shrub with deep maroony leaf stems and tiny white flowers like the tassels on a stripper. Last year I had one

. Pale custard-yellow flowers, blackish stems and great leaves.Sanguisorba canadensis - I'm a complete sucker for a sanguisorba. This was one of the first I grew and is an absolute star. Spires of sparkly clean white flowers that stand beautifully all

Last spring I found a foxglove seedling in a pot, which had presumably self-seeded from a neighbour's garden. Excited, I potted it on and nurtured it in anticipation of seeing it flower this year. (Foxgloves are biennial, so flower in their second

Clover, most commonly Trifolium repens, is a perennial weed with shamrock-like leaves and fragrant white flowers. It colonises gardens and lawns using runners that fix into the ground, and competes with other plants for space to grow. Once it

's not confirmed how the virus is spread, but sap-sucking insects, nematodes and gardening tools, such as pruning knives, are likely contenders.Canna leaves develop pale spots and streaks, as well as a distorted, crinkly look, while flowers may also become

, and can be picked off by hand.The moment you spot an infestation, spray them with pyrethrum. If the plants are in flower, spray in the evening, so pollinating insects aren't affected.verbascum, buddleia, figwortsmid-spring to midsummerMore advice