Key Code: L1

Chlorosis begins as a marginal yellowing.

Potential deficiencies:

Key Code: l1a

Magnesium deficiency begins as a yellow leaf margin and progresses to an interveinal chlorosis and scorching. In later stages of production, may be evident below transitional bracts as well. Deficiency may be induced by excess sodium, potassium or calcium.

Key Code: l1b

Potassium deficiency begins as a yellow leaf margin, rapidly developing into necrosis of the margin bordered by dark, purplish discoloration. May be induced by excess calcium.

Potential toxicities:

Key Code: l1c

Boron toxicity begins as a distinct leaf margin yellowing, followed by necrosis.

Key Code: l1d

Lithium toxicity begins as a distinct leaf margin yellowing, followed by marginal necrosis of the old leaves and tip burn on bracts.

Key Code: l1e

Sodium toxicity may express symptoms of marginal leaf yellowing, leading to necrosis.

Key Code: L2

Chlorosis begins as an interveinal yellowing or discoloration.

Potential toxicities:

Key Code: l2a

Manganese toxicity starts as small brown spots along interveinal tissue. Veins remain green and normal in appearance.