Other discolouration
Light burn: bleached leaves closest to the lamp
Pale or bleached leaves at the very top of the plant, closest to the light, may mean too much light or heat.…
Hemp russet mites: the pest you can’t see
Upward-curling leaf edges and a dull, bronzed look, with no webbing and no bugs you can find, may mean russet mites. They're…
Purple stems and petioles: the phosphorus myth
Purple stems are not a reliable sign of phosphorus deficiency.