Killarney

<p>By Debby Looney, gardening expert</p>
<h3>It is definitely beginning to feel like spring has arrived, despite the recent storms and blast of cold.</h3>
<p>Nature is programmed to grow when the days get longer, and there is ample evidence of this! Due to the mild January we had, many plants were fooled into thinking it was later in the year, especially roses, and these got a cruel scorching during the hail showers we experienced.</p>
<p>If you are new to gardening, do not worry, they will grow out of this. If you have not pruned your roses, it is a good time to do it, then they can divert their energies into strong new growth.</p>
<p>It is also a good time to look at your box hedges or plants, if you have them. Box blight, or Cylindrocladium buxicola, has become a problem in recent years, and it is advisable to cut out and burn any sections that are affected. A hard prune back will encourage a regeneration of weaker plants, but if they are too far gone, it is best to take them out altogether. Blight has been ruled the cause of many problems which affect Buxus plants, but in my experience more common issues have been ignored. Ground conditions certainly affect the plants more often than blight – box plants will be yellow and stunted if the ground is too heavy and waterlogged. Similarly, plants will lose their leaves if the ground is too dry, and can do so very suddenly. Unless there is visible new growth you will not notice a Buxus plant wilting if it is dry, which is a regular occurrence in pots, but also in sandy, or poor, soil. The plant will shed its leaves, seemingly for no reason, and blight will be blamed, as opposed to poor watering! Another common problem with box plants is whitefly. This little pest can really wreak havoc, as it goes unnoticed in the dense growth for a long time. Again, it would seem that your plant is losing its leaves for no reason. However, on closer inspection, you will notice white webbing or white fluffy deposits, which is evidence of whitefly. If the plant is shaken, a cloud of tiny white flies will emerge. These are quite difficult to control (similarly in houseplants, where they are prevalent), and a systemic pesticide is often best, as opposed to a topical spray.</p>
<h3>Watch out for wind scorch</h3>
<p>Wind scorch will also cause your plants to look poorly turning them a shade of ochre which looks very similar to underfed plants. The plant will grow out of this discolouration if it is sheltered, or fed. If these problems have been eliminated, and it is blight you are dealing with, a product such as Provanto Fungus Fighter is an option, as well as quite a few organic sprays which are now available. The symptoms to look out for are brown/black spots or lesions on the leaves, which then become dry and fall off. The spores remain viable for five years, so good hygiene and strong plants are key. Pruning your plants on a very dry day is preferable as blight spreads in humid conditions. Keeping tools clean and sterilised is also advisable. Clean up any dead leaves at this time of year and feed with a high quality slow release fertiliser, such as the specialist ‘Topbuxus’ products which are formulated by Buxus nurseries themselves. Avoid tomato food, a general shrub fertiliser will have a better range of nutrients. Apply a good layer of mulch around your plants to keep them moist in the summer.</p>


Whitefly can wreak havoc on your plants

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