20 ft high rose bush by
Ryorry 7 Sep 2019 13:21You need to get it a mate to have sex with :)
Seriously, they need to cross-pollinate with another tree like them (but not exactly the same variety is best, so, eg I have a Filbert Cosford which is buddied up with a Kent Cob). Planted them about 25 feet apart for max effect, but I think 15-40 feet apart may be OK. They can either be kept down to large shrub size by pruning, or allowed to grow to their max.