|What flowering vine or climbing rose can you recommend to cover a 20 foot tree that will enjoy partial shade and be disease resistant?|
|Climbing roses, like all roses, will grow best in full sun. Zephirine Drouhin and Sombreuil are antique climbing roses that can tolerate partial sun. Whether or not a rose would receive enough sun in your situation depends on how dense the shade fron your tree is. Also, these roses would only reach about 8 to 10 feet in height.
Clematis tend to be a bit more shade tolerant than roses, and the fall blooming clematis or Clematis terniflora is quite large and can grow to over 15 feet. This might be a possible choice.
These are the only plants that I can think of that come at all close to your requirements. Perhaps your local nursery professional will also have some suggestions based on a more detailed understanding of the growing conditions where you want to plant your vine. Good luck with your project!