How to Plant and Grow Stunning Amaryllis Flowers Outdoors

Updated on April 23, 2019
Casey White profile image

Dorothy is a Master Gardener, former newspaper reporter, and the author of several books. Michael is a landscape/nature photographer in NM.

The amaryllis flower can be outrageously beautiful.
The amaryllis flower can be outrageously beautiful. | Source

Most people think of lily-like amaryllis flowers as Christmas-gift plants, and they do make excellent gifts. But many of them can be grown outdoors year-round in certain zones for gardeners who simply want to beautify their garden. They are available as singles and doubles and come in reds, pinks, salmon, near-orange, creamy yellow, and white—all with some outrageously beautiful designs. As a bonus, some are even fragrant. With a minimal amount of care, they will come back year after year.

Since amaryllis bulbs are native to South America, they are tropical and can be grown successfully outdoors in very warm and frost-free zones.

Where, When, and How to Plant Bulbs

Where: If you are in USDA growing zones 9–11, you are in luck if you are planning to plant your amaryllis bulbs outside. Amaryllis bulbs need to be planted in an area where they will receive full sun. They can grow in areas of light shade, but in full sun you can expect them to develop stronger stems and more flowers. One note of importance is that you should never plant amaryllis bulbs in soil that gets soggy, as the bulbs will most certainly rot. Approximately six hours after a hard rain, if you still see water puddles, you will need to choose another location.

When: Amaryllis can be planted from September through April in warm weather climates, although most people prefer to have theirs in the ground by late October.

How: The area in which you plant amaryllis bulbs must drain very well. Once you have the ideal place in mind for planting, determine the soil's pH, which will help you in determining if your soil is sand, silt, clay, or loam. Once determined, and if necessary, amend it a few months prior to planting, as amaryllis grows better in a soil mix that is high in organic matter. You could use two parts of loam soil and mix in one part perlite to one part of well-rotted manure. If you don't have manure available, try using peat, leaf mold, or compost; or one part loam, one part sand, and one part compost.

Dig holes deep enough that will allow you to plant the bulbs with an inch of the bulb above the surface of the soil. Plant the bulbs about 8 to 12 inches apart and water well, soaking the soil so that it settles around the bulb. After the initial soaking, water very sparingly, as the bulb doesn't require more moisture until there is growth to support (keep the soil barely moist until you begin to see leaves). You can usually expect your amaryllis to flower in mid-spring, although occasionally flower stalks will develop in the fall, usually during the first season.

Once the plants have sprouted, you can begin watering more, but don't let the soil get soggy. The leaves of amaryllis plants will grow through the summer and disappear in the fall if the plants are dried off; otherwise, some of the foliage will remain.

This is the amaryllis hippeastrum Peach Melba.
This is the amaryllis hippeastrum Peach Melba. | Source

Continued Care for Amaryllis

If you have a flower bed that is cared for well, you can expect your amaryllis bulbs to remain in the ground and provide you with beautiful flowers for several years.

After their winter bloom, reblooming can be achieved by cutting off the tubular flower stems to within an inch of the top of the bulb when the blooms fade. Leave the foliage, however, to continue growing. Then, water as usual and apply water-soluble fertilizer every four weeks. Your plant should grow a number of leaves during the spring and summer. This will help the plant produce energy for the next year's bloom.

Overwatering is the fastest way to kill amaryllis bulbs.

Dividing Amaryllis Bulbs

Amaryllis bulbs do not need to be divided as often as most other bulbs. But plant division is not only a way to control amaryllis colonies, it also helps to keep your plants healthy. If you decide it is time to divide them, this is the proper way to do it:

  • After the leaves die back, dig up the bulbs and gently separate the offsets from the parents.
  • Replant the bulbs immediately, or you can store them in a cool, dry place until it's time to plant them in the fall. These bulbs go dormant in the winter, so they don't require water or attention.
  • You will need to plant the offsets twice as deep as their height, but don't plant them as deep as the mature bulbs.


  1. Brenzel, Kathleen Norris, Ed. (2012). The New Sunset Western Garden Book, the Ultimate Gardening Guide. Oxmoor House Publishing.
  2. Better Homes and Gardens: New Garden Book (1990). Meredith Corporation, Des Moine, Iowa (pp 366-367).
  3. Nicholson, Nigel (1986). The Illustrated Garden Book. V. Sackville-West, Atheneum, New York.
  4. Pereire, Anita (1994). The Ward Lock Encyclopedia of Practical Gardening. Sterling Publishing Co, Inc.

© 2018 Mike and Dorothy McKenney


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    • Casey White profile imageAUTHOR

      Mike and Dorothy McKenney 

      2 months ago from United States

      You should be just fine by planting them in Zone 9. Thanks!

    • profile image


      2 months ago

      I was given many bulbs and as it is the 5th of May is it to late to plant them? I’m in zone 9

    • Casey White profile imageAUTHOR

      Mike and Dorothy McKenney 

      2 months ago from United States

      You are probably watering too much. Mine is not blooming right now but I find they only need "drinks" of water a few times a week instead of deep watering.

    • profile image 

      2 months ago

      My amaryllis are blooming right now in Palm Springs Ca. I notice that many of the leaves turn yellow and become very limp. Is that too much water or is it normal.I have to irrigate the bed and often wonder if I give too much water or not enough.

    • Casey White profile imageAUTHOR

      Mike and Dorothy McKenney 

      17 months ago from United States

      I absolutely love these flowers. Hope you found something useful, and thanks for your comments about your own. And, thanks for taking the time to read my article.

    • profile image

      Brooklyn Gardener 

      17 months ago

      I ave about a dozen bulbs. Have been growing these for years. i have one bulb that is 12 yrs old. Every Spring I put them out in the garden, clean them off in Oct / Nov and store till Jan. Here in NY they thrive outdoors during summer in part shade. They all bloom for me every year

    • Casey White profile imageAUTHOR

      Mike and Dorothy McKenney 

      24 months ago from United States

      I love them too! I'm eventually going to have a greenhouse so I can grow all of these flowers that I write about. Most of them I have had at one time or another in other locations, but we are now in New Mexico so some of them just aren't right for here. Thanks so much for reading!

    • ChitrangadaSharan profile image

      Chitrangada Sharan 

      24 months ago from New Delhi, India

      These are beautiful blossoms. They look similar to Lilies.

      Thanks for sharing the details and helpful suggestions of planting these gorgeous flowers.

    • Pamela99 profile image

      Pamela Oglesby 

      24 months ago from Sunny Florida

      I really like these flowers, and I have some that have done well. I thnk it was dumb luck that hey are growing with full sun, etc. I appreciate all the good tips.


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