Is this a deficiency or burn? Can't figure it out the stems are going slightly red/purple she's on 18/6 ph is 6.5 she has been hitting 30c so maybe heatstress? Really stuck been giving epsom salts even as foliage spray to no avail this my first grow and on biobizz thanks
Open
Leaves. Edges burnt
Leaves. Dropping off
Feeding. Deficiences