heavier clay, once a week may be enough if you water slowly so it penetrates 8 to 12 inches down. I use a hose on a slow trickle for 15 to 30 minutes at the base rather than spraying the leaves. Wet foliage overnight invites trouble, especially powdery mildew and leaf spot. Young first-year clematis need closer watching and usually dry out faster than older, settled-in plants.
3. Mulch the root zone to keep roots cool and evenly moist
One of the oldest clematis tips is still one of the
