Pruning From Helianthemum Nummularium To Pyracantha

Published: 09th April 2009
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Helianthemum nummularium: - Shorten straggly shoots and cut off old flower heads as soon as the flowers have faded.

Hydrangea arborescens (hills of snow): - During late winter or early spring, cut back by a third to a half all shoots that produced flowers during the previous year.

Hydrangea macrophylla (French hydrangea/mop-head): - There are two forms of this deciduous shrub -Hortensia (Mopheads) and Lacecaps. The old flower heads should be removed in early spring by cutting back to the first pair of new buds. In late winter or early spring, cut out to their bases some of the oldest stems in the centre of the bush to open up the shrub enabling air circulation to the centre of the plant.

Hydrangea paniculata In late winter or early spring, cut back by half all shoots that flowered during the previous year. If the shoots are cut back by two-thirds, larger flower heads are produced, but the shrub's life may be reduced.

Hypericum: - During late winter or early spring, shorten the previous season's strong flowering shoots by a quarter of their length. H. calycinum (rose of Sharon) can be cut down to within a few inches of ground level in early or mid-spring every few years to keep it compact.

Kerria japonica (Jew's mallow/Japanese rose): - After the flowers have faded, cut out the old wood to strong, new growth. Alternatively, sever them at soil level to encourage the development of strong growths from the shrub's base.

Kolkwitzia amabilis (beauty bush): - After the flowers have faded in early summer, completely cut out flowered shoots to encourage the development of fresh growth. Laurus nobilis (bay/laurel): - Specimen bushes and standards, in gardens and large tubs, need clipping with secateaurs two or three times during summer. Rejuvenate neglected and old shrubs in late spring by cutting them back severely.

Lavandula (lavender): - Use garden shears to clip over plants in late summer to remove dead flowers. Where plants have been neglected and become straggly, prune them hard back in spring. This encourages the development of shoots from the shrub's base.

Leycesteria Formosa (Himalayan honeysuckle): - In spring, cut out to ground level all the shoots.

Lupinus arboreus (tree lupin): - In late winter or early spring, remove old, worn-out stems and cut back to a quarter of their length strong growths that produced flowers during the previous year.

Lycium barbatum (Duke of Argyll's tea/matrimony vine): - Occasionally thin out the shoots in summer after the flowers have faded. Cut back any neglected and excessively large shrubs in spring.

Philadelphus (mock orange): - After the flowers fade, cut out all shoots that have produced flowers. Leave young shoots, as these will produce flowers during the following year.

Pieris: - Remove dead flowers. At the same time, cut out straggly shoots.

Pittosporum arbuscula and P. fruticosa (five-finger/shrubby cinquefoil): - These shrubby plants need little pruning, other than cutting out straggly, old and weak shoots at their bases after the flowers have faded. Pyracantha (firethorn) Grown against a wall these shrubs will need to be kept in shape. Shorten long side shoots in mid-spring, but take care not to cut off too many that would subsequently bear flowers.

Information on canadian thistle can be found at the Plants And Flowers site.

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