We have the following varieties of blackberries (Rubus spp.) available in 1 gal pots:
 
Albino - H: 3-8, W: 3-4 ft, Sun: Full to part, Fruit: Large white color blackberries that ripen July. Note: Self-fertile. Zone: 5-8. 
 
Chester - H: 4 -5ft, W: 3-4ft, Sun: Full, Fruit: Large fruit that holds up to heat and ripens July/August, Note: Self-pollinating, thornless, resistant to cane blight, Zone: 5-8.
 
Shipping only available in NY State between May 31st and October 31st. Pickup of potted plants available on the farm or at farmers' market after May 31st and before October 31st.
 
Photo Source: Shona Ort, Ort Family Farm