Group 1 Clematis montana  

Do not prune

Group 1 Clematis alpina  

Do not prune

Are you putting off pruning Clematis ? then read on........

Late February and March is the right time to prune Clematis, except for any early flowering Clematis. The rule is if it flowers before June, don't prune. The first images are of Clematis montana and C. alpina which are the early flowering type of Clematis (called Group 1) and it is most important not to prune these. If you think about it, if a plant is to produce flowers in April and May cutting it back in March is going to remove all the buds.

It can be disconcerting when pruning Clematis to see the new shoots, and then cut them off in the spring prune.
The last image shows a Clematis with many shoots, and those above the pruning line will be sacrificed. Not to worry as this is normal when pruning Groups 2 & 3 Clematis.

How many are removed depends on whether the Clematis is a Group 3 (hard prune,) or Group 2 (lighter prune).

How many are removed depends on whether the Clematis is a Group 3 (hard prune,) or Group 2 (lighter prune).

If you don't know what type of Clematis you have, check out Clematis pruning Groups 1,2 and 3 explained both on the website and video so that you can prune successfully and be rewarded with even more flowers in the summer.

If you cannot remember when it flowered, unless you are confident it was after June, leave it alone. If it flowered "sometime in the summer" treat it as group 2. For next year take a photo of the Clematis in flower and note the month, this should enable you to identify it. If you get stuck drop the Sunday Gardener an email with the photo.

Group 2  Clematis Cystal Fountain

Lighter Prune

Group 3 Clematis tangutica 'Bill MacKenzie'

Hard Prune

Sweet Peas naturally want to grow tall, leggy and keep on growing. As gardeners we want them to grow tall but also to produce lots of flowers. Whether you have germinated your own sweet peas, or purchased small plants and are growing them on, you will see a single shoot growing. If left to its own devices that shoot will grow taller and taller.

By pinching out the top growth, you will make the seeding through out side shoots so that there is more than one single shoot. This means later in the year, more flowering stems per plant. 

If you look at the images above, the first image all the top growth is in place, the second image the plant has been cut back. This will make the sweet pea throw out extra growing shoots which will mean instead of one single long stem there are several branches all of which will, later in the season, carry flowers. By nipping back the stem you will have strong flowers with more shoots. 

The best time to cut back is when the seedling has a pair or two of leaves, then cut it back the leaf and within a week/10 days you will see the extra stems appearing.  More about growing sweet peas.  You will have stronger and more floriferous plants. 

Gardeners and garden magazines often refer to the need to 're pot a plant' but how do you know when to do this?

Re pot too soon and you risk a small plant loosing itself in an overly large pot, too late and the roots are a tangled mess and the plant is pot bound.

The first thing is to look at the underneath of the pot, carefully holding the plant in place. Can you see roots and plenty of them?

If so slide the plant out of the pot and look. Illustrated left is a cucumber plant and you can see that there are lots of roots, filling the space and most of the compost, but not jammed in. This plant has filled up its pot, it is ready for potting on, just at the right stage before it becomes too congested.

Given that I want to make sure the cucumber has lots of growing space I potted it on into a pot around 10cms (in total) larger than the existing pot so it has about 5cms depth and on each side to grow into. This is a bit generous, but cucumber are vigorous and growing strongly at this time of year. It will expand nicely into the space and hopefully soon some juicy home grown cucumbers to enjoy.

Take care not to pot a plant into too large a pot, especially in the early stages when the plant is small. Often in a too large pot the plant will sulk, it can die back. Compost is differently constructed to soil and the compost and be too wet for the small plant, it takes longer to dry out than soil causing the plant to become stressed and fail to thrive. It is essential to plant health in containers to pot up size by size, just a few centimeters up each time not a leap into a large pot. 

If you think the pot is a little too large hold back on the watering until the plant gets further establised. 

  February is  not too early to begin planning summer colour.

Sweet Peas are a colourful, highly scented annual climber which can be started off in February.  At this stage sow underglass and keep warm until they have successfully germinated. Sweet peas can then be hardened off ready for planting out usually around April. Sweet peas are half hardy annuals so will take a fair degree of cold once established. Pinch out the top growth to have multiple stems per plant and more summer flowers. For details tips and sowing advice check out How to Grow Sweet Peas.

There are also summer flowering bulbs which can be started off  later  February such as Dahlia and Lily. Plant only during a mild spell and bear in mind they are not frost hardy. It should take around 6 weeks or more for the top growth to emerge which should be around mid to late April. If there is a frost protect the top growth with a cloche. Planting early, with the right winter protection, will get the bulbs off to an early start. If you garden in an exposed area prone to late frosts, or with a lot of winter wet delay planting until later in March.

For more tips on growing Dahlia and Lily.