Deficiencies in 5-1-1 or season?
Two months ago I potted several plants into Al's 5-1-1, and several more since. I updated their progress a month ago here (http://forums2.gardenweb.com/forums/load/contain/msg0301115119857.htm l) and will post some 2 month updates later on to my blog for anyone who is interested (send me a pm).
Recently I have been noticing some deficiencies in some of my plants, in particular lemon and a couple of my blueberries.
These defencies look like this on my blueberry;
And this on my dwarf eureka lemon;
At the same time, we are into the second month of Autumn here in Aus, and we have been having cooler temperatures averaging about 6oC at night and 21oC at day (42.8/69.8F). We will have our first frosts in about 2 weeks or less.
The plants with these deficiencies were planted into 5-1-1, the blueberries with no ammendments apart from some slow release osmocote for acid loving plants. The lemon had some dolomitic lime added, but not a huge amount.
I fertilise at least twice weekly with a half dose of an acid loving soluble fertiliser for the blueberries and a half dose of miracle grow all purpose soluble for the lemon.
I add a small dash of vinegar to the blueberries 9L watering can on most occasions, and about 1/4 tablespoon of epson salts weekly.
A few days ago, thinking that the chloriosis in the blueberries was likely iron related I added 15g iron sulfate to each blueberry pot, and sprayed the leaves of the chloriotic plants with a dilute solution of iron sulfate with a few added drops of washing liquid.
I did a pH test this morning and found that the blueberries soil was acidic, and this leads me to believe that perhaps the problem isnt iron related after all. Here is the result of the test, with two sample of the soil from the blueberry pot, and two from the lemon.
Interestingly, the problems in my blueberries have both occured mainly in the rabbit-eye type. The highbush types, although in the same mix, made up 2 weeks later (only difference being a larger grade of perlite) seem to be totally fine with dark green glossy leaves
I would love to know the experts thoughts on this, or if I am over-thinking the whole thing!
This post was edited by naikii on Sat, Apr 6, 13 at 21:06