23/09/2026
Amaryllis BULB GRADING & FLOWERING-SIZE CRITERIA
- Commercial grades are commonly expressed by circumference: 22/24, 24/26, 28/30, 30/32 cm.
-Large-flowered cultivars generally need larger bulbs for reliable flowering and multiple scapes.
- Commercial forcing guidance commonly uses 24/26 and above for large/double material, but cultivar response varies.
- Judge flowering potential by circumference plus cultivar, health and reserve status.
References:
1. Onings Holland Hippeastrum forcing guide;
2. Clemson Extension;
3. Hadeco commercial bulb information.
Prepared by Anwar Javed • © 2026 • Slide 5/15
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