Although amaryllis is a tropical flowering plant, it is most commonly seen during the winter months when it is often grown indoors. The bulbs come in a variety of shapes and brilliant colors sure to brighten the dreariest winter day. Care of amaryllis is often a question, but does amaryllis need fertilizer? If so, you may wonder when to fertilize amaryllis and what are amaryllis fertilizer requirements? Read on to learn more.
Does Amaryllis Need Fertilizer?
Amaryllis is often given as a gift during the holiday season wherein folks treat the plant as a one-shot, single blossom plant, almost like cut flowers. Once the bloom is gone, the entire bulb is often tossed as well. However, amaryllis can be grown year-round, and you can even entice it to bloom again by feeding amaryllis plants. Proper amaryllis bulb fertilizer is the key to a healthy plant and show-stopping bloom.
When to Fertilize Amaryllis
You should begin feeding amaryllis plants once the foliage begins to peek out above the soil surface-- NOT before it has foliage.
Amaryllis fertilizer requirements are not particularly special; pretty much any slow-release or liquid fertilizer that has an N-P-K ratio of 10-10-10. If using a slow-release fertilizer, apply every three to four months. When using a liquid fertilizer, feed the plant two to four times monthly, either every week or bi-monthly. Keep the bulb in as much natural sunlight as possible at this stage of growth.
If you would like to continue to grow your amaryllis instead of tossing the bulb into the compost, remove the blossom as soon as it begins to fade. Cut the stem off just above the bulb to remove the flower. Put the bulb back in a sunny window. During this period the bulb is growing, so you need to keep the soil moist and fertilize at regular intervals as above.
To get the plant to re-blossom by forcing the bulb, amaryllis needs a period of dormancy. To force the bulb into blooming, quit watering and fertilizing for eight to ten weeks and place the bulb in a cool, 55 degrees F. (12 C.), dark area. The old leaves will wither and yellow and new growth will begin to emerge. At this point start watering again, remove the dead foliage, and move the plant into a full sun location.
If you live in USDA hardiness zones 8 to 10, the bulb can also be moved outdoors after all danger of frost has passed in the spring. Select a sunny area of the garden that gets some shade during the hot, afternoon hours and mulch around the bulb. Plant bulbs a foot (31 cm.) apart in well-draining soil.
Snip any dead leaves to encourage new growth, keep the bulb moist, and feed the amaryllis bulb a fertilizer that is lower in nitrogen, like 0-10-10 or 5-10-10, sometimes called a “blossom booster” fertilizer. Keep using this slow-release fertilizer from March through September.
Fertilize the first time as new growth begins to emerge and again when the flower stalk is 6 to 8 inches (15-20 cm.) in height. A third application should be applied when the old flower heads and stems have been removed.
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