How To Plant Amaryllis Bulbs Outside [ Full Guide ]

Amaryllis bulbs are known for their stunning, trumpet-shaped flowers that bloom in vibrant colors, making them a popular choice for both indoor and outdoor gardens. While many people are familiar with growing amaryllis as potted plants indoors, they can also thrive when planted outdoors, adding a splash of color to garden beds, borders, and containers. Planting amaryllis bulbs outside requires careful consideration of location, soil preparation, acclimatization, and timing. This comprehensive guide will walk you through the step-by-step process of planting amaryllis bulbs outside, ensuring that you successfully cultivate these beautiful flowers in your outdoor garden.

Quick Answer: How To Plant Amaryllis Bulbs Outside

  1. Choose a Location: Select a well-drained, sunny spot with some shade in the afternoon.
  2. Prepare the Soil: Ensure the soil is fertile, well-draining, and slightly acidic.
  3. Acclimate the Bulbs: Gradually expose the bulbs to outdoor conditions to prevent shock.
  4. Timing: Plant bulbs in the spring for summer blooming or in the fall for spring flowers.

Now, let’s delve into each step in detail to understand the nuances of planting and caring for amaryllis bulbs in an outdoor setting.

Choosing The Right Location

Selecting the right location for planting amaryllis bulbs is crucial for their successful growth and blooming. Amaryllis thrives in well-drained soil and needs adequate sunlight to produce vibrant flowers. Here’s how to choose the perfect location for your amaryllis bulbs:


Amaryllis bulbs require plenty of sunlight to bloom abundantly. Choose a location that receives at least 6 hours of direct sunlight daily. However, in regions with scorching afternoon sun, it’s advisable to provide some shade during the hottest part of the day to prevent the bulbs from getting sunburned. An area with dappled sunlight or partial shade in the afternoon can be ideal for amaryllis.

Soil Drainage

Good soil drainage is essential for preventing waterlogged conditions, which could lead to bulb rot. Avoid planting amaryllis bulbs in areas where water tends to pool after rain. If you have heavy clay soil, consider amending it with organic matter such as compost to improve drainage. Elevated beds or raised planters can also provide better drainage for the bulbs.

Wind Shelter

While amaryllis bulbs enjoy good air circulation, excessive wind can cause their tall flower stalks to sway and potentially break. If your garden is prone to strong winds, consider planting amaryllis bulbs in a location that offers some protection from gusts. Alternatively, you can provide support stakes to keep the flower stalks upright.

Preparing The Soil

Once you have chosen the perfect spot for planting your amaryllis bulbs, it’s important to ensure that the soil is conducive to their growth and development. The right soil conditions can make a significant difference in the health and vigor of the plants. Here’s how to prepare the soil for planting amaryllis bulbs:

Soil Composition

Amaryllis bulbs thrive in fertile, well-draining soil. A loamy soil rich in organic matter is ideal for their growth. Ensure that the soil pH is slightly acidic, ranging between 6.0 and 6.8. If your soil is too alkaline, you can lower the pH by adding elemental sulfur or an acidic organic amendment like peat moss.

Soil Preparation

Before planting the bulbs, it’s essential to prepare the soil by loosening it to a depth of at least 12 inches. Remove any weeds, rocks, or debris from the planting area to provide a clean and hospitable environment for the bulbs. Incorporate organic matter such as compost, well-rotted manure, or leaf mold to enrich the soil and improve its texture.


Amaryllis bulbs benefit from a balanced fertilizer with a higher phosphorus content to promote robust root development and blooming. Incorporate a slow-release, granular fertilizer into the soil according to the manufacturer’s instructions. Alternatively, you can apply a water-soluble fertilizer when the shoots emerge, ensuring that it reaches the developing bulbs.

Acclimating The Bulbs To Outdoor Environment

Amaryllis bulbs that have been grown indoors need to be gradually acclimated to the outdoor environment to prevent shock and allow them to adjust to the new conditions. Sudden exposure to direct sunlight, temperature variations, and outdoor pests can stress the bulbs and affect their growth. Follow these steps to acclimate your amaryllis bulbs to the outdoors:

Gradual Transition

If you have been growing amaryllis bulbs in pots indoors, begin the acclimatization process about two weeks before the last expected frost date in your region. Start by placing the pots in a sheltered outdoor location with filtered sunlight for a few hours each day. Gradually increase the duration of outdoor exposure over the course of a week.

Protection From Elements

During the acclimatization period, keep a close eye on the weather forecast and bring the bulbs indoors if there is a risk of extreme cold, heavy rain, or strong winds. Consider covering the bulbs with a breathable material like burlap or frost cloth to shield them from harsh sunlight and sudden temperature drops. Once the threat of frost has passed, you can proceed with planting the bulbs in the prepared outdoor location.

Pest Awareness

As you acclimate the bulbs to the outdoors, be mindful of potential pests such as slugs, snails, and rodents that may pose a threat to the bulbs. Take precautions to protect the bulbs from these pests by using organic pest control methods or physical barriers, if necessary.

Timing: When To Plant Amaryllis Bulbs

The timing of planting amaryllis bulbs is crucial for ensuring optimal growth and blooming. Depending on your climate and the desired blooming season, you can plant the bulbs in the spring for summer flowers or in the fall for spring blooms. Here’s a detailed breakdown of when to plant amaryllis bulbs based on the desired flowering season:

Spring Planting For Summer Blooming

If you want your amaryllis bulbs to bloom during the summer months, plan to plant them in the spring once the danger of frost has passed. Aim to plant the bulbs at least 8 to 10 weeks before you wish to see the flowers in full bloom. This allows sufficient time for the bulbs to establish roots and produce flower stalks.

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Fall Planting For Spring Blooming

For stunning spring blooms, consider planting your amaryllis bulbs in the fall, ideally 6 to 8 weeks before the first anticipated frost date. This timing allows the bulbs to settle into the soil, develop roots, and initiate flower bud formation during the winter dormancy period. When spring arrives, your amaryllis bulbs will be ready to produce a spectacular display of flowers.

It’s worth noting that amaryllis bulbs may take a season to acclimate to their new outdoor environment and may not bloom as profusely in the first year compared to subsequent years. However, with proper care and maintenance, the bulbs will establish themselves and reward you with increasing blooms in the following seasons.

Planting amaryllis bulbs outside can bring an enchanting display of vibrant flowers to your outdoor garden. By choosing the right location with proper sunlight, ensuring well-drained and fertile soil, acclimating the bulbs to the outdoor environment, and timing the planting correctly, you can set the stage for the successful growth and blooming of your amaryllis bulbs. Whether you opt for spring or fall planting, the rewards of patiently tending to these bulbs will be evident in the form of stunning blossoms that brighten your garden year after year. With the comprehensive guidance provided in this article, you are equipped to embark on your journey of planting and nurturing amaryllis bulbs outside, adding a touch of elegance and color to your outdoor landscape.

Steps For Planting Amaryllis Bulbs Outside

Amaryllis bulbs are beautiful and vibrant flowering plants that can add a splash of color to any garden or outdoor space. While they are commonly grown indoors, with the right conditions, they can also be successfully planted and grown outside. Planting amaryllis bulbs outside allows them to thrive in a more natural environment and can result in larger and more numerous blooms.

However, it is important to note that planting amaryllis bulbs outside requires some careful preparation and consideration of the climate and conditions in your area.

  1. Choose the Right Location: Before planting your amaryllis bulbs outside, select a suitable location in your garden or outdoor space. Amaryllis plants require full sun to partial shade, so choose an area that receives at least 6 hours of direct sunlight each day. The soil should be well-drained and slightly acidic (pH 6.0 to 6.5) for optimal growth.

  2. Prepare the Soil: Enrich the soil in the planting area with organic matter, such as compost or well-rotted manure, to improve its fertility and drainage. Dig a hole that is approximately 8 to 10 inches deep and wide enough to accommodate the amaryllis bulb.

  3. Plant the Bulbs: Place the amaryllis bulb in the prepared hole, with the pointed end facing up and the roots spread out at the bottom of the hole. The top of the bulb should be level with or slightly above the soil surface. Gently backfill the hole with soil, pressing it down with your hands to eliminate any air pockets.

  4. Water Thoroughly: After planting the amaryllis bulbs, give them a thorough watering to settle the soil around the roots. Be careful not to overwater, as excessive moisture can lead to bulb rot. Allow the soil to dry out slightly between waterings, but do not let it become completely dry.

  5. Provide Support: Amaryllis plants develop tall flower stalks that may require support to prevent them from bending or falling over. To provide support, insert a stake near the bulb at the time of planting or as soon as the flower stalk starts to emerge. Tie the stalk to the stake using soft garden twine or plant ties as it grows.

  6. Monitor and Adjust: Regularly monitor the amaryllis plants for signs of growth and adjust the support stakes as needed. The plants may require additional ties or a taller stake as the flower stalk continues to grow. Keep in mind that amaryllis plants can reach heights of up to 2 to 3 feet, so ensure that your support system can accommodate their full growth.

Watering And Fertilizing

Proper watering and fertilizing are essential for the successful growth and flowering of amaryllis bulbs. Here are some guidelines to help you maintain the right moisture and nutrient levels for your plants:

  1. Watering: Amaryllis bulbs prefer slightly moist soil but can be susceptible to rotting if they are overwatered. Water the plants when the top inch of soil feels dry to the touch. Provide a deep watering, ensuring that the water reaches the roots. Avoid splashing water directly onto the bulbs, as this can increase the risk of rot.

  2. Avoid Overwatering: During periods of heavy rainfall or excessive watering, the soil may become waterlogged. If this happens, the bulbs can rot. To prevent overwatering, make sure the planting site has good drainage. If the soil retains too much moisture, consider planting the bulbs in raised beds or containers.

  3. Fertilizing: Amaryllis bulbs benefit from regular fertilization to promote healthy growth and abundant blooms. Apply a slow-release, balanced fertilizer, such as a 10-10-10 or 14-14-14 formula, according to the package instructions. Start fertilizing when the plants start to emerge in early spring and continue every 4 to 6 weeks until the flowers fade. Avoid applying excessive amounts of fertilizer, as this can lead to burned foliage or stunted growth.

  4. Cease Fertilization: In late summer or early fall, stop fertilizing the amaryllis plants. This allows them to enter a period of dormancy, which is necessary for the bulbs to develop and store energy for the next growing season. During this time, continue to water the plants sparingly, allowing the soil to dry out slightly between waterings.

Protecting Bulbs From Pests And Diseases

Amaryllis bulbs can be prone to certain pests and diseases, which can affect their overall health and longevity. Here are some tips to help protect your amaryllis bulbs from common issues:

  1. Inspect for Pests: Regularly inspect your amaryllis plants for signs of pests, such as aphids, mealybugs, or spider mites. These tiny insects can infest the foliage and flowers, causing damage and hindering the plant’s growth. If you notice any pests, remove them by gently washing the affected areas with a stream of water or by using insecticidal soap or neem oil.

  2. Prevent Bulb Rot: Bulb rot, caused by fungal infections, can quickly spread and destroy the bulbs. To prevent bulb rot, ensure that the soil has good drainage and avoid overwatering. Remove any dead or decaying foliage as soon as possible, as it can provide a breeding ground for fungal spores. If necessary, apply a fungicide recommended for bulb rot prevention according to the package instructions.

  3. Control Nematodes: Nematodes are microscopic organisms that can cause damage to the roots of amaryllis plants, leading to stunted growth and poor flowering. To control nematodes, plant marigolds or other nematode-resistant plants around your amaryllis bulbs. These plants release chemicals into the soil that repel nematodes.

  4. Practice Good Hygiene: To prevent the spread of pests and diseases, practice good hygiene in your garden. Regularly remove fallen leaves and debris from the planting area to eliminate hiding places for pests and reduce the risk of fungal infections. Clean any gardening tools before and after use to avoid transmitting diseases between plants.

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Mulching For Winter Protection

In regions with harsh winters, it is important to protect amaryllis bulbs from the freezing temperatures and frost. Mulching provides insulation and keeps the bulbs warm during the dormant period. Here’s how to mulch your amaryllis bulbs for winter protection:

  1. Timing: Apply mulch around the amaryllis plants in late fall, before the first frost is expected. This allows the plants to acclimate to the cooler temperatures gradually and prepares them for dormancy.

  2. Choose the Right Mulch: Select a mulch material that provides good insulation and moisture retention, such as straw, shredded leaves, or pine needles. Avoid using heavy, compacted mulch or materials that can create excess moisture around the bulbs, as this can lead to rot.

  3. Apply Mulch: Spread a layer of mulch around the amaryllis plants, covering the soil to a thickness of 2 to 3 inches. Ensure that the mulch does not touch the base of the plants, as this can increase the risk of rot. Leave the top of the plants exposed.

  4. Monitor Moisture Levels: During the winter, periodically check the moisture levels in the soil beneath the mulch. Water sparingly if necessary to prevent the bulbs from drying out completely. Be cautious not to overwater, as excessive moisture can cause rot.

  5. Remove Mulch in Spring: As the weather warms up in spring and the danger of frost has passed, gradually remove the mulch from around the amaryllis plants. This allows the bulbs to emerge from dormancy and stimulates new growth.

Planting amaryllis bulbs outside can be a rewarding endeavor, allowing these vibrant flowering plants to thrive in a natural setting. By following the steps outlined in this guide and providing proper care, you can enjoy the beauty of amaryllis blooms in your garden year after year. Remember to choose a suitable location with adequate sunlight and well-drained soil, water and fertilize appropriately, protect the bulbs from pests and diseases, and provide winter mulch for insulation. With a little time and effort, you can create a stunning display of amaryllis flowers that will be the envy of your neighborhood.

Caring For Amaryllis Bulbs During Growth And Bloom

Amaryllis bulbs, with their stunning and vibrant flowers, make a beautiful addition to any garden. While amaryllis bulbs are commonly grown indoors, they can also be planted outdoors, adding a touch of elegance and color to your garden beds or containers.

1. Selecting The Right Location

Before planting your amaryllis bulbs, it’s crucial to choose the right location in your garden. Amaryllis bulbs grow best in areas that receive at least 6 hours of direct sunlight daily. Additionally, they prefer well-draining soil, so make sure that the chosen spot has good drainage to prevent waterlogged roots.

2. Prepping The Soil

To ensure optimal growth, prepare the soil before planting your amaryllis bulbs. Start by removing any weeds and rocks from the planting area. Loosen the soil using a garden fork or tiller, incorporating organic matter such as compost or well-rotted manure to improve drainage and fertility.

3. Planting The Bulbs

The ideal time to plant amaryllis bulbs outdoors is in the spring, after the danger of frost has passed. Here’s a simple step-by-step process for planting amaryllis bulbs:

  1. Dig a hole that is approximately 6 to 8 inches deep.
  2. Place the amaryllis bulb in the hole with the pointed end facing upward.
  3. Ensure that the top one-third of the bulb is above the soil level.
  4. Backfill the hole with soil, gently firming it around the bulb.
  5. Water the newly planted bulb thoroughly to settle the soil.

4. Watering And Fertilizing

After planting, it’s important to provide adequate water to promote healthy growth. Water the amaryllis bulbs deeply once a week, aiming to moisten the soil to a depth of about 6 inches. However, it’s crucial to avoid overwatering, as this can lead to root rot. Monitor the soil moisture level and adjust your watering routine accordingly.

During the growing season, amaryllis bulbs will benefit from regular fertilization. Apply a balanced, slow-release fertilizer every 4 to 6 weeks, following the manufacturer’s instructions. This will provide the necessary nutrients for robust growth and abundant flowering.

5. Staking And Supporting

As the amaryllis plant grows, it may require staking or support to prevent it from leaning or toppling over, especially when exposed to strong winds. Use stakes or a plant support ring to gently secure the stem without causing any damage. As the flowers begin to open, you may also want to use flower supports to keep the blooms upright.

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Post-Bloom Care And Storage

1. Deadheading And Pruning

Once your amaryllis bulb has finished blooming, you’ll need to remove the spent flowers to encourage the plant to direct its energy towards bulb development. This process is known as deadheading. Gently snip off the faded flowers at the base of the stem using clean and sharp pruners.

After deadheading, allow the foliage to continue growing. The leaves will photosynthesize and provide energy to the bulb for future growth and blooming. Avoid cutting back the leaves until they turn yellow or brown naturally, as this signals that the plant has finished its growth cycle.

2. Storage For Reblooming

If you live in a region with harsh winters or want to ensure the bulb’s survival, you can opt to dig up and store your amaryllis bulbs for future bloom. Here’s how to do it:

  1. Wait until the leaves have turned yellow or brown naturally before digging up the bulb.
  2. Use a garden fork or shovel to carefully lift the bulb from the soil, taking care not to damage the roots.
  3. Gently remove any excess soil from the bulb and inspect it for any signs of damage or disease. Discard any damaged bulbs.
  4. Allow the bulb to dry in a well-ventilated area for a few days.
  5. Once dry, store the bulbs in a cool (around 50°F or 10°C), dark, and dry location. A mesh bag or a cardboard box lined with peat moss or vermiculite works well for storage.
  6. Check the bulbs periodically during storage, discarding any that show signs of rot or decay.

Common Mistakes To Avoid

To ensure the successful growth and blooming of your amaryllis bulbs, keep these common mistakes in mind and try to avoid them:

1. Overwatering

One of the most common mistakes is overwatering the amaryllis bulbs. These bulbs prefer well-draining soil, and excessive moisture can lead to root rot and bulb decay. Only water when the soil feels dry to the touch, and make sure the water drains away from the plant properly.

2. Planting Too Deep

Planting the amaryllis bulbs too deep can inhibit their growth and may prevent them from blooming altogether. Remember to plant the bulb with the top one-third above the soil level, allowing it to receive sufficient sunlight to trigger flowering.

3. Insufficient Light

Amaryllis bulbs need ample sunlight to produce vibrant blooms. Planting them in a shady area will result in weak growth and fewer flowers. Ensure that the chosen location receives at least 6 hours of direct sunlight daily.

4. Failing To Support The Plant

As mentioned earlier, supporting the amaryllis plant is essential to prevent it from toppling over. Neglecting to stake or support the stem can lead to breakage and damage to the plant.

Troubleshooting Common Issues With Amaryllis Bulbs

Despite being relatively easy to care for, amaryllis bulbs can encounter a few common issues. Here are some troubleshooting tips to help you tackle these problems:

1. Lack Of Blooming

If your amaryllis bulbs fail to bloom, several factors may be at play. Insufficient sunlight, planting too deep, or not allowing the leaves to photosynthesize adequately can hinder blooming. Make sure your bulbs receive enough direct sunlight, plant them at the right depth, and allow the foliage to complete its growth cycle naturally.

2. Pest Infestation

Amaryllis bulbs can attract pests such as aphids, mealybugs, and spider mites. Regularly inspect your plants and take prompt action at the first sighting of pests. Use insecticidal soap or neem oil to control and eliminate the pests, following the product instructions carefully.

3. Root Rot

Overwatering or poorly draining soil can lead to root rot in amaryllis bulbs. If you notice the foliage turning yellow or brown and the bulb becoming soft or mushy, it may be suffering from root rot. To salvage the bulb, remove it from the soil, trim away any rotting or diseased roots, and replant it in fresh, well-draining soil.

4. Leaf Yellowing

Yellowing leaves can be a sign of underwatering or nutrient deficiencies. Ensure that you are watering the bulbs adequately, keeping the soil moist but not overly saturated. If the yellowing persists, consider fertilizing the plants with a balanced, slow-release fertilizer to provide the necessary nutrients.


Planting amaryllis bulbs outside can bring a burst of beauty and color to your garden. By following the steps outlined in this article for planting, caring for, and storing your amaryllis bulbs, you can enjoy their stunning blooms year after year. Remember to choose a sunny spot with well-draining soil, support the plant as it grows, and provide adequate water and nutrients during the growing season. With a little care and attention, your outdoor amaryllis bulbs will reward you with an enchanting display of vibrant flowers.


What Is The Best Time Of Year To Plant Amaryllis Bulbs Outside?

Amaryllis bulbs should be planted in the fall, ideally 6-8 weeks before the first frost in your area.

How Deep Should I Plant Amaryllis Bulbs?

Amaryllis bulbs should be planted with the neck of the bulb just above the soil line, with about 1/3 of the bulb exposed.

What Type Of Soil Do Amaryllis Bulbs Prefer?

Amaryllis bulbs thrive in well-drained, fertile soil with a slightly acidic pH level of 6.0-6.5.

How Often Should I Water Amaryllis Bulbs After Planting?

Water amaryllis bulbs thoroughly after planting and then only when the top inch of soil is dry. Over-watering can cause bulbs to rot.

Do I Need To Fertilize Amaryllis Bulbs?

Yes, you should fertilize amaryllis bulbs every 2-3 weeks during the growing season with a balanced fertilizer. Stop fertilizing once the plant has stopped blooming.