For container-grown hyacinths, feed from early spring until six weeks after flowering. Bulbs grown in water in glass vases need no feed.
Hyacinth fertilizer
Choose the setup before feeding Hyacinthus orientalis. Use high-potassium liquid fertilizer for potted bulbs from early spring to six weeks after flowering. Do not feed bulbs grown in water.
Check for active growth
When to fertilize
Feed potted bulbs during spring flowering and for six weeks afterward, then stop as foliage yellows and the bulb enters storage or rest. Bulbs grown in water need no fertilizer.
Follow the product label
Fertilizer type and dose
Use a high-potassium liquid fertilizer, such as a tomato fertilizer, for bulbs grown in pots and follow the package directions. Use no fertilizer for a bulb grown in a water vase.
Take the dose and frequency from the chosen product label. No universal household milliliter dose is established, and a water-forced bulb needs no fertilizer.
Inspect a stressed plant before feeding
When not to fertilize
A wilting display or yellowing foliage should prompt a check of the bulb’s container, water-vase setup, and seasonal stage rather than automatic extra feed. Stop watering as container foliage yellows.
Sources
- Royal Horticultural SocietyOngoing Care; Feeding; Storage
- Royal Horticultural SocietyCultivation; botanical details; propagation
- Iowa State University Extension and OutreachForcing; after bloom; water-forcing display