CLEMATIS

MIne are doing OK in the ground. Not sure whether they like being in pots. I have also found that They are much more vigorous by their third flowering season.

You need to know which pruning group each Clematis belongs to. Then you will be able to cut them back and get them stronger, also flowering closer to the bottom of the plant rather than up at the top.. Unfortunately, it's the habit of many of them to do this anyway, leaving bare stems. The answer to that is to plant something else in your pots to cover the bare bits. Do you know the pruning groups, or the names of your Clematis? If you need help with that aspect, please feel free to send me a private message with their names and I'll try to help.

Clematis of all types are also very greedy feeders. In pots they really do need a lot of liquid fertiliser (Maxicrop is good). Also, they do dislike having their rooots get hot, so the pots may need to be shaded from bright sunshine. You can do this by putting more smaller pot plants around the one containing the clematis.

Check out my blogs - I wrote a couple on pruning that you may find helpful

I have the same problem, am going to remove them from the pots and re plant in the garden with my roses that are climbing through obilisks. Roses and clematis are very good planting buddies