please help plants are sick.....

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2012_07230007.jpgneed help, with figuring these plants problem out...there outside about 6 ft tall, looks to me like it might be begining of lock out???but recently also noticed i was only giving them 1/2 dosage of maxi, was using a miracle grow sppon, which is half...of maxis spoon...below was my scheldue for this month
july 1st....1 gal drop superthrive
3rd......reg dose miracle grow, all feeding with i gal of water
5th....2 spoons maxi, but really only one half dosage using wrong spoon
6th watered pretty good with hose
8th water in 3 scoops decompose horse shit with hose, decompose for 1 year
10..1 spoon of maxi wrong spoon equaled 1/4 dosage
11....2 spoons of maxi 1/2 dosage
12......1 gal with 1/2 dosage cal mag
17th...2 spons of maxi still 1/2 dosage, all feedimngs with i gal of water
20.....finally figured out using wrong spoon gave them reg dosage 2 teaspoons 1 gal of water
21....1 gal with 1 drop superthrive and 1/2 dosage cal mag...
plant started showing problem middle of month and im in cal temps been 90 to 110....being using 8 drops in city water of ph down as city water is usually 7...but holes have been used for 4 years now and really really poor drainage....getting ready to flush with 5 gals with no ph water...plants were planted on 4-20....
 
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