I would recommend two citrus sites with a lot of experts who can help. Millet is a site administrator and knows everything about citrus. I grow lemons & limes in containers in S. Indiana. I have learned in the short time I've been a citrus gardener that soil drainage is absolutely essential and that citrus trees demand a good amount of nitrogen - but less phosphorus (P) and potassium (K). Overwatering can also be death for citrus.
