Watering once a week seems a little low to me. We need photos, that will help. What potting mix are you using? Is the pot big enough for the tree? How frequently are you fertilizing and with what? How much sun does the tree receive a day? And, you'll get a better response if you post this over on the Citrus Forum :-) Patty S. This post was edited by hoosierquilt on Thu, Jun 27, 13 at 12:37

I would go with full size cherry trees, Apple trees 3/ or bigger. Saskatoons, persimmons, Peach tree (if any grow that far north). Try a pawpaw patch. That far north I though all you would need is a high bush blueberry bush to shade the whole yard. lol

Hi,loss of some fruits is normal.The tree balances things out as citrus tend to be greedy flowering.Once the fruits get half the size of a ping pong ball they are usually there to stay.Are the tiny fruits going yellow and then falling off? With such an establisehd tree,you shouldnt need a constant supply of water,in fact thats what i think is causing your fruit drop.They do benefit from plenty of food,lack of nitrogen could cause the drop.Are the leaves Dark green or pale and yellow.I would feed with a citrus fertilser high in nitrogen and some magnesium and water deeply once a week. something like npk 25/5/15 plus trace elements.or a 20/20/20 Buy fert especially for citrus,spikes are not the way to go and let the tree dry out a bit.It will have huge roots and can search for water.Citrus dont need that much water. High nitrogen is important but not from urea.The trace elements influence the quality of the fruit.In the winter,dont water at all.Spread the fertilser around the tree out to the drip line but keep away from trunk.Mix in to top soil and water deeply.Especially,if new growth present. Spring and autumn are good times to feed,with 4 or 5 handfuls approx.They are very greedy feeders.A lot of home garden trees fail because of lack of food.Even a balanced general garden fert would do the job but nitrogen and magnesium(epsom salts if ur fert is low in it) are important.Good luck

MIchelle, Not likely. If the tree has gotten that large, it has probably been getting what it needs. Can you post pics of the leaf shapes you see on the tree and also of the fruit exterior, the open end and the inside of the pulp? That would help in identification. How would you describe the flavor? What state is it located in? Thanks! Ruben