Frances Tophill's guide to June pruning

Plants to prune now:

Now is the perfect time to concentrate on pruning to encourage strong new growth that will bear next year’s spring flowers. A little reshaping now can be really effective.

Deutzia

Give deutzia a light all-over trim to create a more solid shape or remove one in three old stems to rejuvenate the shrub.

Hippophae

Once the leaves appear, prune out any dead wood and on established, bushy plants, thin out one or two branches. Leave some to carry berries.

Philadelphus

Thin one or two of the oldest philadelphus stems right after flowering, so new shoots have enough time to produce next year’s flower buds.

• How to prune philadelphus

Clematis montana

Those plants that have become congested and unruly can be pruned as needed, once flowering has finished.

• How to prune clematis

Avoid pruning:

• Grapevines: Although you will start thinning the fruit as soon as you see it forming, grapevines should only be heavily pruned when they are fully dormant.
• Group 3 clematis (viticella or texensis types): These should be pruned in February/ early March. Any later and you won’t get flowers.
• Roses: Although deadheading is recommended after flowering, do not prune roses hard now, as they are just starting the flowering season.
• Walnuts: Walnut trees can bleed if any major pruning is carried out this month, so just stick to removing any dead material.

Step by step: Pruning chaenomeles

These are magnificent shrubs that bear beautiful flowers in spring (if the blue tits don’t eat all the flower buds). They can traditionally be grown as a kind of climber, though they do not naturally cling to surfaces in any way.

Chaenomeles have a tendency to flop forwards, and once they become robust shrubs, training them back can be tricky. It’s better to start them off well and get them growing where you want them as soon as they are planted. Ideally wait until just after they flower. The finished result should be a natural fan shape, on a strong wall or fence, where every branch has healthy buds and room to grow.

Step 1

Assess the shape of the shrub, looking for the strongest branches (the ones you will keep) and where things are going awry. Check if any part of it is diseased, damaged or dead.

Step 2

Using canes tied into securely attached horizontal wires, tie in the strongest and most healthy stems so that they follow the framework. Aim to cover the fence or wall evenly.

Step 3

Prune out stems that are unhealthy or sticking out away from the fence, and growing in the wrong direction. Also take out any growth that is congesting the base of the plant.

Step 4

Encourage more flowering by pruning back long growth to the flowering spurs. This shrub is still in flower, so it is easy to see where flowers will form – generally in clusters by the main stems.

Also prune this way:

Spring-flowering evergreen ceanothus (California lilac) has a similar woody structure and can also be trained against a wall or fence, so it requires similar treatment to chaenomeles. It should also be pruned immediately after the flowers (beloved by pollinators) have faded.

Tie in the new growth regularly. When the branches reach the end of the canes making a fan-shape, you can tie in more canes. When thick woody stems have formed you can remove the canes, letting the plant form a fan-shape without them