Are leaf tips yellowed and curled down?

  Added by: Nietzsche  Last edited by: Nietzsche  Viewed: 751 times   Rated by 5 users: 5.67/10

Sulphur (S) deficiency
The initial symptoms are the yellowing of the entire leaf including veins usually starting with the younger leaves. Leaf tips may yellow and curl downward. Sulfur deficiencies are light green fruit or younger leaves with a lack of succulence. Elongated roots and woody stem. Although it's hard to see in figure 19, the upper stems of this plant are purple. Although many varieties of cannabis do get purplish stems, the trait generally extends the entire length of the plant's stem, and not just near the top as in this specimen.

Figure 18.

Sulphur Toxicity
Leaf size will be reduced and overall growth will be stunted. Leaves yellowing or scorched at edges. Excess may cause early senescence.

  Last modified: 21:45 - Jun 22, 2001  

faq:1031 "Are leaf tips yellowed and curled down?"