I think I'm going to sprout some seeds I have from different landrace sativas, to keep the gene pool growing.
Half strenght may be too much, landrace generally needs low ec ( 1.3 max in full flower, ec from the water included). Try 1/4 the strenght then go up if plants respond well... or even better, buy a ec meter and see for yourself how much they need.
Why the attittude? Trying to help you there...
https://www.icmag.com/ic/showthread.php?t=11688
Look at the middle of post seven.