Posted: 14/05/2014 at 16:10
Clematis don't like to be thirsty but they hate being waterlogged even more. It's much better to water once a week and thoroughly than to give a constant dribble which eiither doesn't penetrate or doesn't drain.
If you can, move Westerplatte to a sunnier, more sheltered position as it needs more than 2 hours a day. Comtesse de Bouchaud shouldn't ned extra watering if she's in the ground unless you have a drought and the whole bed is wilting from lack of moisture.
All clematis are very hungry plants so you need to give them a good dollop of specialist clematis feed every spring and a good mulch of garden compost in autumn to keep the soil and roots healthy. If grown in pots, they also appreciate a liquid feed of rose or tomato food once a week from spring to flowering time. This regime will also help make them strong enough to fight pests and diseases and recover from wilt if they get it.