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How to grow gladiolus with more flowers

 
The research conducted in Holland found that the higher the K amount, the Gladiolus have more flowers and healthier bulbs
 
 

Crop/cultivar

Gladiolus/ Traderhorn
Country / locationHolland / LBO trial station @ Lisse (flower-bulb research center)
ObjectivesLong-term research (1994-1997) intended to: Find best K and N  S.D. regime. Learn K uptake by the plant
Haifa product testedMulti-KMg prill
Application methodSide dressing , soil application
Tested treatment4 x S.D. @ 230, 465, 700 or 930 Kg/Ha Multi-KMg
Control treatment results 199419951996
Mean bulb weight (g)36.431.229.1
Bloom rate (%)  55.4
Botrytis infection rate (1-10 scale)  6.3
Fusarium infection rate (%)  0.93
Best treatment results 199419951996
Mean bulb weight (g)41.635.129.4
Bloom rate (%)  72.3
Botrytis infection rate (1-10 scale)  2.0
Fusarium infection rate (%)  0.0
Characteristics of best treatmentYield increase: 1-13%.
Grower’s revenue from yield:  depends on bulb size and variety
Cost of treatment (application + material) 250 US$/Ha
Net benefit of best treatment400 US$/Ha
Benefit/Cost ratio1.6
ConclusionsGeneral: Gladiolus is a relatively high K demanding crop, it can be regarded as a target crop. The higher the K amount, the more flowers & healthier bulbs.
Bulb size: on previous years there was found a positive effect. It did not show this year. Best results can be expected from treatments at the latter growth stages - August onward.
ReferenceM. Roelofs; Mr. Bruin, LBO trial Station