Amaryllis are among the most rewarding indoor bulbs to grow during the winter months. Their large, trumpet-shaped blooms bring colour and life to homes at a time when most outdoor plants are dormant. For gardeners in the Pacific Northwest, where winters are cool and daylight is limited, amaryllis provide a bright burst of cheer indoors with very little effort.
The plant commonly sold as “amaryllis” is technically a Hippeastrum, native to Central and South America. True Amaryllis species come from South Africa, but over time the name “amaryllis” has become the popular term for these showy, tropical bulbs. The hybrid varieties available today have been bred for decades to produce large, colorful flowers in shades of red, pink, salmon, white, and bicolor blends.
Each bulb stores everything it needs to bloom — just add warmth, light, and a bit of moisture, and the tall flower stalk will emerge within a few weeks. The blooms can last for several weeks indoors and make excellent gifts or decorative accents during the winter season.
Background and Origin
Hippeastrum was introduced to Europe in the 18th century, where plant breeders began crossing species from South America to create the large-flowered hybrids we know today. These bulbs became popular as winter houseplants because they could be encouraged to flower indoors when little else was blooming.
The name “amaryllis” comes from Greek and can be translated as “to sparkle,” which reflects the bright, eye-catching appearance of the flowers. Modern hybrids are produced mainly in the Netherlands and South America and are shipped worldwide each fall for winter blooming indoors.
How to Grow Amaryllis Indoors
Amaryllis are straightforward to grow indoors, but a few key steps will help you get strong stems and reliable blooms, especially in the low-light winters of the Pacific Northwest.
1. Choosing and Planting the Bulb
Start with a large, firm bulb. Larger bulbs usually produce more than one flower stalk. Choose a pot that is about 2–3 inches (5–8 cm) wider than the bulb and has drainage holes. Use a well-draining indoor potting mix rather than garden soil.
Place the bulb in the pot so that the top third of the bulb remains above the soil surface. This helps reduce the risk of rot and allows the bulb to dry slightly between waterings. Firm the soil gently around the bulb, water thoroughly once, and then place the pot in a warm, bright location (around 20–24°C / 68–75°F).
2. Light and Temperature
Amaryllis need bright, indirect light to develop strong stems and quality blooms. A south- or west-facing window works well; an east-facing window can also be suitable. During our darker Pacific Northwest winters, making use of the brightest available window is important.
As the flower stalk grows, rotate the pot every few days to keep the stem growing straight. After the blooms open, slightly cooler indoor temperatures (around 18°C / 65°F) will help the flowers last longer.
3. Water and Moisture
Water thoroughly after planting, then allow the top inch (2–3 cm) of soil to dry before watering again. The goal is to keep the soil lightly moist, not soggy. Overwatering is one of the most common causes of bulb rot.
Do not allow the pot to sit in standing water. Empty any excess water from saucers or decorative outer pots. In the cool, damp Pacific Northwest, it is generally better to water slightly less often rather than too frequently.
After Blooming and Encouraging Rebloom
Once the flowers fade, cut off the spent flower stalk close to the top of the bulb. Leave any healthy green leaves in place. These leaves are important because they allow the bulb to store energy for next year’s bloom.
Continue to water the plant when the top of the soil feels dry and feed lightly every few weeks with a balanced indoor plant fertilizer. The leaves will continue to grow and help recharge the bulb.
When the risk of frost has passed in late spring, you can move the potted bulb outdoors to a bright, sheltered location. Morning sun with some protection from intense afternoon sun works well. Keep watering through the summer, allowing the leaves to grow freely.
By late summer or early fall, begin to reduce watering. Allow the leaves to yellow and die back naturally. This signals the bulb to enter a rest period. Once the foliage has died back, move the pot to a cool, dark place (about 10–13°C / 50–55°F) for 8–10 weeks. The soil should be kept just barely dry during this time.
After the rest period, bring the pot back into a warm, bright room and resume light watering. The bulb should begin to send up a new flower stalk, starting the blooming cycle again. With consistent care, a healthy amaryllis can rebloom for many years.
Waxed Amaryllis: A Modern Option
Waxed amaryllis are a newer trend in holiday décor. These are standard amaryllis bulbs coated in coloured wax. They are designed to grow and bloom without soil or watering. The wax seals in enough moisture and stored energy for one full bloom cycle.
To grow a waxed amaryllis, simply set it in a bright location at normal room temperature. Within several weeks, the flower stalk will emerge and eventually produce a cluster of blooms. No potting or watering is required.
Waxed bulbs are usually treated as single-use items. Once they have finished flowering, the bulb is often too weakened to rebloom. Some gardeners try to remove the wax and replant the bulb in soil, but success is not guaranteed. If long-term reblooming is important, a traditional potted amaryllis is a better choice.
Common Questions
When should I plant my bulb?
For holiday blooms, plant the bulb in November. For later winter or early spring flowers, plant in December or January. Most bulbs flower about 6–8 weeks after planting, depending on temperature and variety.
How long do the flowers last?
Individual blooms usually last two to three weeks indoors. Cooler indoor temperatures and bright, indirect light help extend the display.
Can amaryllis stay outdoors year-round in the Pacific Northwest?
In most parts of the Pacific Northwest, amaryllis bulbs are not hardy in the ground. Winter cold and wet soil can damage or kill them. They are best kept as indoor or patio plants that are brought inside each fall.
Troubleshooting
- No flowers: The bulb may not have had enough light, or it may not have received a proper rest period.
- Floppy stems: Usually caused by low light. Move the plant to a brighter location and rotate the pot regularly.
- Bulb rot: Often due to soggy soil or poor drainage. Make sure the pot drains freely and allow the soil to dry slightly between waterings.
Five Tips for Success with Amaryllis
- Start with a quality bulb. Larger, firm bulbs generally produce stronger growth and multiple flower stalks.
- Provide bright, indirect light. Use the brightest window available during winter to keep stems sturdy and blooms strong.
- Avoid overwatering. Keep the soil lightly moist and never let the pot sit in standing water.
- Do not remove healthy leaves after flowering. The foliage feeds the bulb and prepares it for next year’s blooms.
- Allow a proper rest period. A cool, dry dormancy of several weeks helps reset the bulb and encourages reliable reblooming.