Pruning lavender the right
way is necessary to maintain the health, vitality, and beauty of this
remarkable little herb. Lavender doesn’t require a great deal of maintenance,
but some attention is needed in the pruning department. The most important
thing to remember is to begin pruning lavender while the plant is still young.
This way new growth will be encouraged right from the start. It also prevents
the stalks from becoming woody in the center, which is a common problem amongst
lavender plants that have not been pruned regularly.
Pruning Young Lavender Plants
When the lavender plants are
young, and preferably still in pots, simply pinch out any new growth, and cut
off the flower heads in the very first year. Although it might seem a strange
thing to do, it actually encourages the branches to grow laterally and the
flowers and spikes to grow larger the following year. After this, you’ll only
need to continue pruning lavender plants about once per year throughout their
lifespan.
Pruning Lavender after the First Year

Lavender plants should be
pruned once per year, after the first year, after they have flowered in the
spring or summer. Pruning lavender in the fall is also permissible, as long as
it is done well before the first frost. Use hedge trimmers or pruning shears,
if possible, to keep things nice and tidy. Prune back about 1/3 of the new
growth each time. Pruning lavender any more than this may cause it to wither
and die, so use caution. It’s better to prune too little than to prune too
much. Do not cut
all of the new
growth down to the stems, as lavender may not survive this type of heavy
pruning.
Pruning Old Lavender Plants
Pruning lavender plants that
are beyond three years old, or of an indeterminate age, and have never been
pruned before is a little trickier. Older lavender plants will not survive
heavy pruning, especially if there is more woody growth than new, green growth.
If there is new growth visible above the woody stalks, begin by pruning back as
much of as possible above the woody areas, without actually cutting into them.
This is best performed in the summer time, and only once per year. This
technique for pruning lavender will encourage new growth along the entire stem,
and may eventually result in a plant that can be reshaped.

In some cases, pruning
lavender plants that are aged, and not accustomed to pruning won’t do any good,
and they may need to be replaced. However, this depends on the type of
lavender, and its hardiness and condition. Try pruning lavender for a year or
so, and if it doesn’t appear to help the plant, consider replacement.
Warning:
Never prune old wood from
lavender plants unless it is completely dead. Also, pruning lavender until
there is no foliage left will most likely kill the plant. Always use caution
while pruning lavender to keep your plants as healthy and happy as possible.