Thanks for the reply. I've attached the soil test results for this blueberry patch from Penn State. Exchangeable Cations for Mg is 0.5 % Saturation of the CEC for Mg is 3.1 I did two other soil tests in other parts of my property with different soil types. One area that is a vegetable garden that I limed and fertilized with Garden Tone last year. It's MG numbers are 1.8 and 18.4 and the Mg is a little high. The test says pH is 6.9 an I need 1.75 lbs of 10-10-10 per 100 square feet. The other area is old farm fields that are mostly clay and worn out. The Mg numbers there are 1.1 and 11.4. No amendments yet for that area. Soil test says 5 lbs/100 square foot of Calcitic Limestone plus 3.5 lbs of 10-10-10 plus 0.5 lbs of 0-46-0.

Citrus are heavy feeders, are you feeding regularly with a micronutrient fertilizer? Realistically it's almost impossible to tell what nutrient is missing from the plant, and it's not relevant because the solution is always the same, give it a good fertilizer with all the micro nutrients. Don't bother with the epsom salts or iron, just go for a nice slow release fert with all the micros. I like osmocote plus which is 15-9-12 and has all the micronutrients. In the mean time you can give it some dyna-gro liquid foliar-pro at a low dose if you have it lying around. The osmocote plus can be had at home depot for about 20$ or so, it's not cheap, but it's good stuff. Here's my reasoning, you're not going to alter the pH of your soil easily with a plant in the ground, and you're still going to need to add fertilizer.

Ok, I need to stop reading all these posts about Epsom salt. I was cooking dinner the other night and went to the pantry to get "Extra Virgin Olive Oil and Epsom Salt." I grabbed the EVOO and stood there with a blank look on my face, finally grabed a box of salt, saw that it said "KOSHER SALT" and then relized that I actually wanted Kosher Salt in my dinner, not Epsom Salt. Good thing I keep the Epsom salt under my sink and not in the pantry, or who knows how dinner might have turned out! Plumeria on the brain or what? Brighty

Hi Bruce, I don't add epsom salts (magnesium) to my soil, I've never had a magnesium deficiency. There was a time when I added epsom salts to the planting hole because that was what several people (including my mother) had said to do. But I stopped doing that when I read the article referenced below. I will admit I have not done a side by side comparison. Maybe I will next year, or I could give a couple of plants an epsom salt drench and see if it makes a difference. I tend to think it will not. A Washington State University Puyallup Research and Extension Center document about Epsom salt myths that in part states There are two reports from over 60 years ago on tomato production. When tomatoes are grown on magnesium deficient soil, a foliar application of Epsom salts can relieve magnesium deficiency in tomato plants; no effect on yield was reported. An automatic application of Epsom salts to plants or soils that are not magnesium deficient is a poor management strategy that can injure the plants and contaminate the soil. I am not saying you don't have a magnesium deficiency, but it is kind of unusual outside of Greenhouse situations. You don't have your zone and location included in your user name or anywhere in your post, knowing that information could help respondents give you more accurate answers to your questions. You can edit your user name to include that information. Have you had a soil test? A soil test would give you a definitive answer and is always a good idea before one starts to make amendments to the soil. Can you post pictures? If it isn't a magnesium deficiency, to be able to suggest what might be wrong with your plant, it would be helpful to know more about the environment it is in. So, here are the "usual" questions: Is the plant in the ground or in a container? If in a container, what growing medium are you using? How large is the container? Is it self-watering or do you manually water it? Is the container in full sun, part sun or shade? For both container plants and inground plants, it would be helpful to know these things as well: How often do you water? Have you checked the moisture of the growing medium or soil 3-5" below the surface? Is it dry, just right, or soggy? Are you feeding the plant? How often? What are the NPK values of any fertilizers you are using to feed it? What has the weather been like in your area? If the plant is in the ground: Have you used any amendments? Do you mulch? If so, with what and how much (how deep)? Are there any other plants near the problem plant that are showing similar issues? The more information you can give us, the better the chances that someone can give you an accurate diagnosis. Betsy