Coco grows need Ca/Mg, soil not so much. I'd watch my PH and use bloom nutes. If you can take a few natural light shots and show both top and bottom leaves and remind me what your feeding and if its soil, coco, or hydro.
Cheers
Hi miller , I use biobizz light mix and advanced nutes .
The girls are 7 weeks on wednesday , finish at 12 weeks , DP Xtreme .
Yesterday there was very minor tip burn and a few spots i thought were me spilling nutes , but today , gob smacked and annoyed .
I will take some pics tomorrow in daylight .
I use everything the same as this .
Days-1 to 10 - plain tap water (PH 7.4)
Days 10 to 15 - 5ml Sensi Grow A, 5ml Sensi Grow B, 5ml Voodoo Juice.
Days 15 to 20 - 6ml Sensi Grow A, 6ml Sensi Grow B, 5ml Voodoo Juice, 5ml Carboload.
Days 20 to 25 - 7ml Sensi Grow A, 7ml Sensi Grow B, 5ml B52, 5ml SensiZym, 5ml Carboload, 5ml RhinoSkin.
Days 25 to 30 - 8ml Sensi Grow A, 8ml Sensi Grow B, 5ml B52, 5ml SensiZym, 5ml Carboload, 5ml RhinoSkin.
Day 30 - Flush medium of mineral build up by passing water through soil,I will use water straight from the tap no sitting out and I will put 40L through my 15L pots with the last 5L containing 5ml Sensi Bloom A, 5ml Sensi Bloom B and 5ml Voodoo juice. The medium will not need watering on day 31.
Day 32 to 35 - 9ml Sensi Bloom A, 9ml Sensi Bloom B,5ml Voodoo Juice,5ml BigBud, 5ml Carboload,5ml Calmag.
Day 35 to 40 - 10ml Sensi Bloom A, 10ml Sensi Bloom B, 5ml Voodoo Juice, 5ml BigBud, 5ml Carboload, 5ml Calmag.
Day 40 to 45 - 10ml Sensi Bloom A, 10ml Sensi Bloom B, 5ml B52, 5ml BigBud, 5ml Carboload, 5ml Calmag.
Day 45 to 60 - 10ml Sensi Bloom A, 10ml Sensi Bloom B, 5ml-B52, 5ml Overdrive, 5ml Calmag, 10ml Carboload, 10ml Bud Factor X.
Day 60 to 70 - just water with un-PH'd water.
That was an exact post from TaNg and how he grows those giants on youtube
Be safe .