What to Do If Narcissus Only Grows Leaves and No Blossoms
The narcissus is known as the fairy of the waves for its beauty, but it often encounters the embarrassing situation of only growing leaves and not blooming during maintenance. This article deeply analyzes the five key factors affecting narcissus flowering, from bulb selection to environmental regulation, and provides professional solutions to help you restore the exquisite and beautiful flower posture of ice肌玉骨.
One: The Quality of Bulbs Determines the Foundation for Flowering
Analysis of Poor-Quality Bulb Characteristics
Bulbs with a diameter less than 4cm often lack sufficient nutrients, and bulbs with sunken or moldy surfaces have reduced viability. It is recommended to choose high-quality bulbs with a circumference ≥20cm, tight bulbs, and intact basal root plates.
Pre-Treatment Techniques for Bulbs
Before planting, the outer brown epidermis should be peeled off, soaked in a carbendazim solution for 30 minutes for disinfection, then dried and a cross-shaped incision should be made at the bud point, with the depth not damaging the germ.
Two: Temperature Regulation Affects Flower Bud Differentiation
Temperature Requirements During Growth Stages
The vegetative growth stage requires 12-15°C to promote leaf growth, and the flower bud differentiation stage requires 8-12°C low temperature stimulation. The day-night temperature difference should be maintained at about 5°C, which can be achieved by opening windows at night for natural cooling.
Remedial Measures for Abnormal Temperatures
If encountering persistent high temperatures, the plant can be moved to a north-facing balcony; when the temperature is too low, use the double-potting method, filling the outer pot with sawdust as an insulating layer.
Three: Water Management Controls Growth Balance
Scientific Water Change Schedule
In the early stage of hydroponics, change the water every 2 days, and after the roots have formed, change the water every week. Retain 1/3 of the original water to maintain microbial balance when changing water, and the water temperature should be consistent with room temperature to avoid root stress.
Water Level Control Points
Keep the water level covering 2/3 of the roots, as too deep water can cause bulb rot. Place raindrops stones to stabilize the plant and also increase dissolved oxygen to promote flower bud development.
Four: Auxiliary Flower-Promoting Maintenance Measures
Light Regulation Plan
Ensure 4 hours of direct sunlight daily, which can be achieved by rotating the pot for even exposure. When there is insufficient light, use a full-spectrum plant grow light to supplement light for 2 hours daily.
Nutrient Supplement Strategy
During the budding stage, add a potassium dihydrogen phosphate solution (0.2% concentration) weekly, and stop fertilizing after the flower bud shows color. For soil-grown plants, bone meal can be buried as a slow-release fertilizer source.
By selecting high-quality bulbs, regulating the environment, and precise maintenance, combined with timely pruning of the残花 (withered flowers) after flowering to supplement bulb nutrients, you can achieve annual reblooming of the narcissus, allowing the elegant fragrance to accompany your desk all year round.