Effect
No effect on nitrogen N use efficiency
No effect on produce quality
Kelpak treated Hydrangea, cv. Phantom, grown in a peat-based substrate in reduced nitrogen conditions had 5 % longer branches, 1 % more branchesk, 14 % more fresh weight, 16 % more dry weight, 11 % better root development, a 2 % higher chlorophyll-index, a 7.4 % higher flavonol-index and a 70.1 % higher anthocyanin-index compared to the untreated control grown in the same conditions. No significant effects.
Trial details
Indoor, greenhouse, peat-based susbstrate, reduced nitrogen (-20 %)
Belgium
Crop
Hydrangea, Hydrangea paniculata
Trial application
Method
Foliar spray
Timing
First application: 7-10 days after planting; repeated at 14-21 day interval up to 4 applications
Rate
2.5 L/ha
2019
Bio4safe trial report Hydrangea 2019
Crop group
