Question: How do I train a clematis to climb a trellis? Do I have to tie it or will it begin to climb on its own?

Answer: Clematis climb by twining their leaf stalks around whatever support is available. Begin by tying it, but as it grows it should begin twining around the trellis on its own. When tying the vine, use garden twine or twist ties, and be careful not to crush the stems, which are very fragile.