Holly might not normally seem like a large enough plant to use for privacy, but that's not the case with this cultivar. Nellie Stevens holly (Ilex 'Nellie R. Stevens') can actually reach heights of 30 ...
DEAR NEIL: If I wanted to grow a Nellie R. Stevens holly as a tree, how would I train it? I see nice shrubs in the nursery. What should I be looking for? Dear Reader: If you want a single-trunk tree ...