Hey dudes,
I posted a previous thread about some issues
You have a few possible problems here in my book...
A virus of some sort but unlikely, some viral infections show like a K def, also do you have any purple stems?
You simply have the wrong Ph at the soil level, its too high... forget run off you need to do a soup test 1:1.5 extraction method?
I'd say your Ph is marginally high for these strains and locking out the Potassium or you are feeding excess calcium trying to fix the problem but making it worse by locking out the K as a result?
Stop the Calmag right now it won't kill it but a K lockout will cause mayhem in all sorts of manner during flower.
I would do a soil Ph test using the soup method as instructed below before you do anything!
The most reliable way of measuring the nutrients present in the potting mix is to use the 1:1.5 extraction method, which
can be used to determine the root environment’s EC and pH. The EC and the pH of the drainage water will normally vary
because potting mix is capable of holding back a number of elements or even refusing them. It is best to carry out a
1:1.5 analysis after three to five weeks. The easiest way to make this analysis is to follow the plan given below step by step:
1. Take a potting mix sample. This can be done with a ground drill or a spoon. Take the potting mix from a large number
of different places to ensure that the sample is representative.
2. Put the sample in a bowl and determine if it is moist enough. This is done by squeezing some potting mix in your hand; if
moisture comes out it is OK. To increase the sample’s moisture content add distilled water. Mix the potting mix well after
adding water.
3. Take a 250ml measuring jug and fill it with 150ml of distilled water. Add potting mix to bring it to 250ml, mix it well and
leave it for at least 2 hours.
4. Mix it well once again and measure the pH. Filter the mixture that you now have and measure the EC. Target values for
the EC are between 1.1 and 1.3 and for the pH between 5.8 and 6.2.
Curled up leaves...?
Maybe incidental but if the whole plant balance is out of synch they could be just a side sympton as in suffering heat, dryness, inadequate transpiration, stress and rolling in to protect the central area from dying. Theres a word for all this but its like for the better good of the whole plants health, get that soil test done and we can look at a solution.
Good luck
