How to replenish nutrition for flowers after autumn

Flowers after a hot summer, often lack certain nutrients, this time to observe the color of the leaves, can be appropriate for the flowers to supplement the lack of nutrition. So how should potted flowers look at leaf color to supplement nutrition?

Salvia splendens

Nitrogen deficiency, plant growth potential weak, leaf color light green, yellow or light brown base leaves; phosphorus deficiency, leaves blue-green and purplish; potassium deficiency, old leaves light green, narrow leaf tips, but veins are still green, generally do not occur withering. Nitrogen, phosphorus and potassium should be supplemented according to specific conditions.

Long-term iron deficiency, leaf tips, leaf margins will gradually wither and expand inward, but the big leaves still remain green. At this time, 0.05%% to 0.1%% ferrous sulfate solution should be sprayed on the leaves.

When magnesium is deficient, the old leaves are yellowed inward from the leaf edge, the veins are still green, the leaves appear yellow stripes and wrinkles, the late leaves often wither, the leaves are small, the flowers are small and the growth of plants is inhibited, and then 0.2%% to 0.4% magnesium sulfate solution needs to be sprayed 2 to 3 times.

Calcium deficiency, the terminal bud is easy to death, leaf tips, leaf edge dead, leaf tips often bent into a hook, root necrosis, serious when the whole plant dead. At this time, 0.2% to 0.4% lime water should be poured, 20 to 30 ml per plant at a time, and 2 to 3 times.