Gardening: Cuttings: Brown box blues

Anna Pavord
Saturday 18 December 1993 00:02 GMT
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GRAHAM HOOKINGS writes from Barry, South Glamorgan, complaining of a problem with his box hedge, which he grew from his own cuttings. 'The young hedge grew well but first one bush, then another, and now practically all of them are showing leaves of a bronzy-brown colour. Have you any idea what could be causing this? I thought perhaps it was iron deficiency so I watered the hedge with Sequestrene.'

Elizabeth Braimbridge of the Langley Boxwood Nursery, Rake, in Hampshire, explains that both the round-leaved box, B japonica, and the common box, B sempervirens, tend to bronze in winter, especially where exposed to bright, clear light and cold winds. This applies also to the dwarf form of box generally used for hedging. Mrs Braimbridge calls it 'protective colouring.'

Bad drainage can also cause discolouration of the leaves. Both box and yew are very fussy about having damp feet. The amount of rain we have had this winter has shown up problems that have, until now, been masked by more than usually dry weather.

Lack of nutrients causes a yellowish cast on the leaves, rather than a bronze one. It is a problem suffered more by box trees growing in pots than those in the open ground. And as Mr Hookings says he has dug in bonemeal and farmyard manure before planting, this is unlikely to be his problem. If he is lucky, he will see his box trees green up again next spring. If they do not, he will have to start mugging up on his drains.

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