Amaryllis (Hippeastrum) is often seen as a mysterious flowering plant. It blooms beautifully when you buy it, and then produces nothing but long, pretty, strap-like leaves. In tropical climates, amaryllis can rebloom year after year if you understand its growth cycle.
In this article, I explain how amaryllis bulbs grow, store energy, and bloom, and how you can reliably trigger flowering.
What Is Inside an Amaryllis Bulb?
Source: https://propg.ifas.ufl.edu/07-geophytes/01-bulbs/01-geophytes-basalplate.html
An amaryllis bulb is a complete plant system. It has several fleshy layers of plant tissue called scales covering a basal plate.
The basal plate is a modified stem which produces leaves, flower buds, and roots. Only the roots are visible from outside the bulb.
A flower bud may already be formed before you see it. This explains why amaryllis can bloom quickly once triggered.
Amaryllis Growth Phase Explained: How to Get Your Plant to Bloom Again
The growth phase is the most important stage in the life of an amaryllis plant.
This is when the leaves grow, photosynthesise, and store energy in the bulb. That stored energy is what determines whether the plant will bloom in the next cycle.
To give your amaryllis plant a good start, pot the bulb in nutrient-rich, well-draining soil. Expose the top third of the bulb to reduce the risk of overwatering. Place it in a sunny spot in the garden and water it regularly, especially if it doesn’t receive rain.
During this growth phase, leaves should be consistently long, firm (not floppy), and dark green. Top up the soil with compost or aged manure every two months or feed with a synthetic fertiliser every month.
You can tell that the growth phase is complete when the leaves have done their job and begin to decline naturally. The bulb should have increased in size as well.
If the leaves are pale, thin, and floppy, then the plant is not storing enough energy. You should concentrate on nourishing the soil that nourishes the plant or moving it to a sunnier location.
For your amaryllis to bloom again, this is the stage to focus on, because flowering depends on how well the plant grows.
How Long Is the Amaryllis Rest Period?
After a period of strong leaf growth, the amaryllis plant naturally begins to slow down. In its natural tropical environment, this corresponds to the dry season, where water becomes scarce.
The leaves, which have been working to store energy in the bulb, gradually turn yellow and die back. This marks the end of the growth phase and the beginning of rest, a natural response to climatic stress.
An adequate rest period for amaryllis is about 6–8 weeks of cool, dry conditions.
In Lagos, where the dry season is becoming less predictable, you may need to create this rest period yourself. You should stop watering and allow the soil to dry out.
Although the plant appears dormant, important internal processes are still taking place as it prepares for the next bloom.
There’s no need to take the bulb out of the soil to rest it unless there’s a risk of overwatering, or you want to separate several bulbs in a pot to prevent overcrowding.
Why the Amaryllis rest period matters
The rest or dormant phase gives the environmental signal the bulb needs to transition from energy storage to flowering.
Flower buds which formed during the active growth phase begin to develop inside the bulb.
If the growth was weak, no flower buds would have formed, and this is the main reason amaryllis fails to bloom.
But without this rest phase, the plant may continue producing leaves and also fail to bloom.
What Happens When You Water Amaryllis After the Rest Period?
After several weeks of dry rest, watering the bulb again triggers it to grow, marking the beginning of a new cycle. This stage mimics the arrival of the first rains after a dry season in its natural environment.
Water gently to keep the soil moist, but avoid overwatering. Watch for signs of growth within a few days.
Sometimes a flower stalk or scape appears before new leaves, and sometimes the foliage appears first. It’s perfectly normal. Do not cut off the foliage.
The hollow flower stalk elongates rather rapidly, but the flowers seem to take their sweet time to develop. It could take up to seven weeks for the first bloom to open after a successful rest period. Be patient.
What to Know About Amaryllis Flowers and How Long They Last
A bulb produces one to three flower stalks. Each flower stalk usually has up to four flowers, which may open in sequence.
Once open, the flower lasts four days or more before drying up. Cooler conditions keep the flowers longer. Harsh sunlight can shorten the life of the flowers.
It’s a good time to bring your amaryllis indoors, styled in a decorative pot, to keep the flowers on the plant longer and to brighten your space.
You can place the plant almost anywhere, but away from a heat source. At this point, the plant is using reserved energy in the bulb and can therefore tolerate low light for up to two weeks. However, placing your amaryllis in bright indirect light is best
Water moderately to keep the bulb hydrated, but avoid overwatering by checking that the soil is dry before watering. Bottom watering is recommended for indoor conditions to get water to the roots first and to avoid crown rot.
The total bloom display could be two weeks or more, depending on the bulb size and number of buds formed. A strong bulb doesn’t just produce flowers; it sustains them.
You could have three flowers open at the same time and weigh the stalk down. Be careful not to allow the stalk to break by supporting it with a stake if necessary.
What Happens to Amaryllis After Flowering?
After each flower shrivels up, cut it off to keep the plant looking pretty. When the last flower has faded, cut off the scape and place the plant in a sunny location again to allow the leaves to continue growing.
Top up the soil with compost to refresh it or repot the bulb if it’s in a small pot (new plants often come in pots just large enough for the bulbs).
This marks the start of the next growth phase
Do Amaryllis Bulbs Need Cold to Bloom?
Amaryllis is a tropical plant and does not require chilling. However, some growers chill their amaryllis bulbs to preserve them and synchronise the blooms.
If you do this, ensure that the bulb is dry and that it stays in the refrigerator for no longer than six weeks to avoid causing damage to the tissues.
I once chilled an amaryllis bulb for eight weeks, and it took a while to recover and bloom. The bloom size was less than spectacular.
According to this study, a 45-day low-temperature treatment (10°C) can accelerate flowering by promoting the rapid elongation of the scape. The cold temperature triggers the breakdown of starch (stored energy) into simple sugars that the plant needs.
How to Know If Your Amaryllis Is Ready to Bloom
Signs your amaryllis will bloom:
- Strong, dark green leaves
- Healthy growth for several months
- Leaves die back naturally
- Large bulb (at least 8cm diameter/ 25cm circumference)
Signs it will not bloom:
- Pale or weak leaves
- Small bulbs
- No clear rest period
Why Do Some Amaryllis Grow Easily in Lagos Gardens?
Most amaryllis sold today are cultivars and are different from the species form Hippeastrum reticulatum, which is more commonly seen in Lagos gardens.
Hippeastrum reticulatum has more oval-shaped leaves with a marked midrib. They multiply easily, tolerate crowding in pots, and flower more frequently.
Species plants are often more resilient because they have adapted to natural conditions over time. Cultivated varieties, especially those bred for large or showy flowers, are often grown under controlled conditions and may require more deliberate care to perform well in everyday garden settings.
Grown in clusters, Hippeastrum reticulatum makes beautiful displays, as the leaves add interest even without flowers.
Finally…
Getting your amaryllis to bloom is about growing strong leaves and big bulbs. The flowers will follow naturally.
Thanks for reading!
