Help Troubleshooting please.

[~sawyer~]

G'day peeps,

 

Just looking for advice and a diagnosis if possible. I got a few plants that a looking a little bit ill. Not on their death beds or anything, but I'd like to stop the problem before it progresses further.

 

Pictures speak a thousand words:

 

 

Basically some of the mature fan leaves have this yellow discoloration. It effects up to 1/3 of the entire plant. It doesn't effect any recent growth.

 

Could it be nute burn? I feed with a homemade seaweed solution ~weekly, so I guess it's possible I'm overdosing them. Any ideas on a deficiency?

 

Also, another plant is suffering from this as well:

 

Any suggestions would be most apreciated.

[mungas]

I'm no expert, sawyer, but it could possibly be nitrogen def??? Has itrained a lot where you are? If so then perhaps the nutes have been leached out of the soil...perhaps???

 

Hit it with a good dose of Thrive. Seaweed is more of a soil conditioner than a balanced feed

Edited December 20, 2010 by mungas

[loylty gets u nothing]

probably absorbed all the nitrogen form soil

or with the rains of late may have leeched it as nitrogen is water soluble

id be dosing with a balanced nutrient mix

i find soil plants generally exhaust the nutes in the soil about 5 weeks into it

maybe next time pack the soil with worm castings and some other ammendments

but for the time being id be foliar feeding til ic an sort a balanced feed

all the best

bil

[Chronmasta]

sorry man, i didnt see this thread....

hope you`ve already fixed em by the time ya read this

 

the fellas have hit the nail on the head...its N deficient

my guess would be because it has shitloads of foliage, which imo would make the plant require more food

 

what would i do

 

......................................supersauce em

 

 

 

good luck mate,

 

[~sawyer~]

Thanks for the replies guys.

 

I went out today and bought myself a flashy new digital pH tester. I guess every grower needs one in their arsenal.

 

A quick test on a soil sample I brought home the other night shows a reading of 7.1. That's slightly alkaline, and looks like it might be a source of some of my problems. Optimum pH for soil is meant to be a few points lower.

 

I'm gonna go test the rest of my soil beds and see what sort of results I get. Giving 'em a dose of some N prob wouldn't hurt either.