yes but it takes more work & experiance. my mentor grows 4-6 trees in little pots,(maybe at most 3 gallon) he has to water ever day and trims the roots every month or so. it seems more work than its worth to me but.....
Your plants will slow growth due too the roots being root bound, you will also have to water more frequently. "This does not make your plants happy and i think we all want our plants to be happy."- Gorege Cervantes