chipmunk and ckbrew say it best.many paths one destination …for beginners I would recommend 5 gal bags and photos gives you plenty of room for the plant to grow out,up and root development.I’ve tried 2,3,5,7 10,12,15 and 30 gallon pots. The 10-30 for outdoor 5-7 for indoor photo.. 2,3 and 5...