I have 2 dwarfs and they're doing extremely well - Pickering which immediately fruited (I dropped all but one) and Mallika which I topped back to 8" tall upon receipt back in Sept. 2013. Both are growing like a weed now full of foliage. White flies and spider mites are my only pests, both now controlled.
Whatever container you use, you'd really be remiss not using a root tip pruning pot system in order to produce a small but highly efficient fibrous root mass, either air or copper hydroxide paint on the inside of the pot. I use RootBuilder.
According to Jim at PIN NDM grows larger than my choices. Another great resource for you would be Karen Petucek in the valley, she loves Mallika and Pickering.
http://www.riversendnursery.com/ She shipped me 3 type of avocado fruits in a large box and will have pitaya soon FWIW. Another great resource is to join the Texas Rare Fruit Growers Yahoo forum. Ed Self is admin, also a member here. Lots of Houston growers are members and post often.
Mark
