How to Fertilize Lilium 'Oriental' (Oriental Lilies)

I. Potted Plants

If grown in pots, use rotted leaves, coarse sand and garden soil as the growing medium, and you can also add burned grass ash, animal manure, etc. to it. Use coarse sand at the bottom of the pot for drainage, the pot should be relatively deep, and place it in a cool area.

II. Growing Period

20 days after planting, apply fertilizer two or three times; during the growing period, topdress once every half month, using compound fertilizer or rotted liquid fertilizer, and do not use fertilizers containing fluorine or alkaline fertilizers, otherwise the leaves will burn. If iron is lacking, you can spray ferrous sulfate. After fertilizing, loosen the soil a little, which is more helpful for nutrient uptake. It has a greater demand for nitrogen and potassium, while phosphorus fertilizer should still be controlled, because too much phosphorus fertilizer will make its leaves turn yellow and withered; when it is about to flower, you can add some phosphorus fertilizer.

III. Before and After Flowering

At this stage, spray monopotassium phosphate once every half month; after the flowers are cut off, use 1 to 2 applications of a quick-acting phosphorus-potassium fertilizer; you can water the roots with rice-washing water, or use urea and a special flower fertilizer, 2 times a month. From bud appearance to the flowering period, add magnesium nitrate twice a month; no fertilizer is needed during flowering; after flowering, apply liquid fertilizer 2 times a month, which can make the leaves more emerald green and help the stems grow more robust.

IV. Severe Winter Season

At 5-8°C in severe winter, you can fertilize once a month; once the temperature drops below 5°C, stop fertilizing, and resume after the temperature rises. From late February to early March, add 8 to 10 grams of bone meal around the edge of the pot.