deficiency? please help time is of the essence

[asdfkry]

hi, ive been scouring the net but cant seem to pinpoint the issue and its getting worse quickly. I really need an experts oppinion...

sunshine #4 and AN micro grow bloom, as well as b-52
nute solution is always ph'd to 6.2 and the ph of the soil is always 6.8-7.0

could this be mn def?

 

[researchkitty]

Looks like nutrient burn to me....... Tips of the leaves turn crisp then works its way up the plant from the bottom of the plant up..................... Yep.

 

[phyzix]

Cut down on nute strength and or frequency.

 

[zippythehippy]

imo its overwatering and too many nutes flush it and let the soil dry out until its dry and inch or 2then water how oldare your plants

 

[asdfkry]

okay.. theyve only been getting nutes about every 10 days, with plain ph'd tap water between feedings. and the same strain took 3x these same nutes last time with out these issues.
even so took ppms down by 400 last feeding.
argh.
before the tips turn brown most of the leaf is already yellow. (starting from the margins), but not papery
and they get bone dry before each watering.

and they 5wk vege JUST switched to flower couple days back

 

[DrFever]

yup flush your girls ASAP with just ph'ed water you got a salt build up in your soil

 

[RyanTheRhino]

Yea that is a case of over feeding. you said you only feed every 10 days. what soil did you use, MG? because MG would have alot of nutes to begin with.

AND did you account for the ph drop from using nutes??

 

[asdfkry]

Yea that is a case of over feeding. you said you only feed every 10 days. what soil did you use, MG? because MG would have alot of nutes to begin with.

AND did you account for the ph drop from using nutes??

sunshine #4 soiless mix, which is petemoss perlite and dolemite lime,
in 5 galon pots they go bone dry every 4-5 days, and between feedings they are watered with ph'd tap water untill i see run off. so they are fed about every 10 days give or take a day or 2

and the nute solution is always ph'd to 6.2-6.3, the run off is similar....

 

[dudeoflife]

Another vote for Overfert/Salt buildup. It only takes too much of one element in the soil to throw everything off, even if the nutes were administered at half strength.

Another possibility is Ca deficiency/lockout, which is common with AN. Calcium def makes the plant more vulnerable to N burn.

Wait til those pots lighten up a bit, then pour through with some good water. It'll take a week to get everything back into balance, but the remaining healthy leaves show that it'll have enough to see ya through with little consequence.

 

[asdfkry]

alright... will adding cal mag mess things up if thats not the issue?
also.. one is progessing very quickly is it a problem if i flush before the pot has dried up?

 

[RyanTheRhino]

Just flush flush flush. a flush is using (2-3)x the volume of the pot they are contained in. so you said it was a 5 gallon bucket. use 10-15 gallons to complete a flush. you can only flush again when the soil is completely dry or else you run the risk of drowning the plant.

don't add the (cal) until you remove the salt buildup by flushing 1-2 times. And FYI (cal) is a micro nute although essential for the health of your plant .lack of calcium will not kill of your plant that quickly compared to a nitrogen lock out. so your best bet is to get your soil stable before adding anything else.