purple stem. everything is the same for all my plants but tiger bomb is getting purple from top of the plant.this strain must not get any purple color. calmag has been in the program since beginning.no cold weather.
If it's just the stem, it's usually sunburn and will not spread to other parts of the plant. If it's in your flowers, it's most likely in need of more phosphorus. Don't go too crazy or you'll lockout calmag. Luck mate!
You should only add cal/mg in soil about every 2 weeks if you see they need a little. Its probably building up in your soil if you add cal/mg every time. Cheers friend