I have been loosing a lot of leaves from me Meyer lemon (I wrote about it earlier last week). It is still quite a problem - I was wondering if anybody could tell by looking at the leaves if the plant is nutrient deficient in some way - or what else might be causing the leaves to fall off.

Thanks for all of your help!!

What is the amount, and frequency, of nitrogen are you supplying to your tree? Leaves showing those types of symptoms are not all that unusual for the last month or so. I have had these symptoms on my Meyer lemon and on a few mandarins. A 2 percent foliar spray of Potassium Nitrate just prior to bloom and 45 days after fruit set helps avoid this problem, plus it also helps the tree to retain more fruit. - Millet (973-)

I'm having some trouble finding a spray - a lot have that in them along with other elements. Is there a particular brand that you suggest?
Thanks!

Potassium nitrate is more or less common fertilizer, any brand would be fine. I buy it in 50-lbs. bags from a couple wholesale suppliers to the greenhouse industry. - Millet (973-)

Potassium nitrate isn't all that easy for a consumer to buy anymore for obvious reasons. The source that has been easiest for me to find is tree stump remover. I know the Spectracide brand of tree stump remover is just potassium nitrate but it is not a very pure grade because of its intended use.

I have found several brands on the internet that have Potassium nitrate as a listed ingredient - is that enough? Ex: Liquid Grow 7-9-5, Oneness One-Part Base Nutrients 5-9-4. Both state that they can be used as foliar sprays.

I just found a supplier - Duda Diesel sells it in 10lb bags as pellets for $21.99. Thank you both for all of your help today!!