Continue to plant hedging
plants, shrubs, trees and climbers. Stakes and rabbit guards should be
put in place at the time of planting trees, to prevent damage to the
rootball or bark.
Continue to plant roses. Avoid planting in areas where roses were
previously growing otherwise new introductions may suffer from replant
diseases.
Move established deciduous trees and shrubs provided the ground is
not frozen or waterlogged.
Tie up splayed out branches on conifers that have become damaged by
the weight of snow or by strong winds.
Check tree ties and stakes. Replace, tighten or slacken them where
necessary.
Firm back newly planted trees and shrubs if they have been lifted by
frost heave or by strong winds.
Check protective coverings on newly planted or borderline hardy
trees, shrubs and climbers, to ensure they remain secure until the risk
of frost has passed.
Remove weeds from around the bases of young trees.
This is the last month you can still take hardwood cuttings of
ornamental shrubs such as Cornus,
Salix,
Forsythia,
Weigela,
Escallonia,
Rosa,
Ribes,
Chaenomeles and
Elaeagnus. Many deciduous
climbers can also be propagated in this way (e.g.
Fallopia and
Lonicera)
Check hardwood cuttings taken last year - they may need planting or
potting on.
Many summer-flowering deciduous shrubs can be pruned between February
and March; usually those that flower on the current year’s growth.
Shrubs that need regular pruning include
Buddleja davidii,
Ceratostigma,
Hydrangea paniculata,
Lavatera,
Leycesteria,
Perovskia, hardy fuchsias, and
deciduous Ceanothus.
Mulch and feed shrubs, trees, hedges and climbers after pruning, to
give them energy for the extra growth they will put on after cutting
back.
Delay pruning spring-flowering shrubs until immediately after
flowering, otherwise this year's display will be lost.
Do not prune slightly tender evergreen shrubs (such as
Choisya, best left until April),
but do tackle hardier examples (such as
Prunus laurocerasus, the cherry
laurel), if necessary.
Remove any reverted green shoots on hardy variegated evergreens, to
prevent reversion taking over.
Deciduous flowering Prunus
species (ornamental cherries, plums and almonds) are vulnerable to
silver leaf if pruned before mid-summer, and anyway should not require
routine pruning if planted with sufficient space for their eventual
size.
When pruning, concentrate on removing overcrowded growth, crossing
stems, and dead, damaged, or dying branches. Aim for an open centre,
through which air can circulate, as this will reduce the risk of pests
and diseases.
Shrubs such as Buddleja davidii,
Salix alba var.
vitellina cultivars and
Cornus sanguinea cultivars are
usually stooled (i.e. cut back very hard), because this keeps them at a
manageable size, as well as deepening the stem colour of those grown for
their winter stems.
If your trees are too large for you to manage pruning alone, you may
need a tree surgeon. Otherwise take care not to damage the tree when
sawing off thicker branches.
Cut out the top rosette of leaves from the leggy stems of
Mahonia x media cultivars to
encourage branching.
Cut deciduous hedges if necessary. They can still be renovated before
leaf emergence.
Tie wall shrubs and climbers onto their supports to protect them from
wind damage.
Ornamental vines, ivy, Virginia creeper and Boston ivy can be cut
back now – it’s a good idea to keep them away from windows, doors,
gutters and roof tiles.
Prune Wisteria by cutting back
the sideshoots shortened by summer pruning to two or three buds
(2.5-5cm/1-2in). Avoid cutting off flower buds.
Spur-prune all current stems on
Campsis by cutting back the laterals to within two or three buds of
the main branches forming the framework.
Cut back late summer and autumn flowering (Group 3)
Clematis to the lowest pair of
strong buds. Mulch and feed at the same time.
Prune winter-flowering jasmine (Jasminum
nudiflorum) once the flowers have faded. Remove any dead or damaged
shoots, tie in new shoots to the main framework, and then shorten all
the laterals coming off the main framework to 5cm (2in), cutting to a
bud. This will keep the plant neat, and improve flowering next winter.
It is a good idea to feed and mulch after pruning, as the plant will put
on lots of growth in response to cutting back.
Summer-flowering jasmines may also be pruned (if necessary),
providing that they are reasonably hardy in their situation. With these
you should remove a couple of stems completely to ground level, and
avoid cutting back laterals, as this would damage the current year’s
flowering potential.
Trim winter-flowering heathers as the flowers fade. Shears are the
ideal tool. This will prevent the plants from becoming leggy and bare.
Sow tree seeds that have been kept in cold storage since collection
in the autumn.
Pest & disease watch
Put rabbit guards around newly planted trees and shrubs to protect
the bark.
Avoid planting roses in areas where roses were previously growing
otherwise new introductions may suffer from replant diseases.
Inspect sick looking box and holly trees for signs of blight.
Bracket fungus on trees is more visible at this time of year. If the
tree is in poor health it is worth calling in a tree surgeon for a
professional opinion.
Phytophthora root rots) can
cause die back on mature trees and shrubs. Wet winter weather and poorly
drained soils are likely to encourage this problem on susceptible woody
plants.
Coral spot is often noticed while the leaves are off deciduous
hedges, shrubs and trees. This problem can be connected with poor
ventilation and congested, un-pruned twiggy growth (as often found
inside clipped hedges).
Check for damage or cankers on deciduous trees.