Roses are a deep root crop, with roots growing as deep as 70 to 100cm. Roses tend to grow in deep, loose and well-drained soil with a low groundwater level, rich organic matter, and a pH of 5.5-6.8. Water in low lying areas can result in rotten branches and withered leaved.
High calcium organic seaweed fertilizer, seawinner microbial fertilizer and trace element fertilizer should be applied in winter, in order to ensure there is plenty of organic matter, trace elements and biological bacterium in the soil to guarantee a continuous high yield and quality, as well as to prevent the premature aging of plant and root, and thus, preventing a bush that will not flower.
Nitrogen fertilizer should be applied during the seedling stage and vegetative stage to promote the growth of the flower seeds. Less fertilizer is needed at early stages, and Haizhuangyuan common formula fertilizer can be used alone through irrigation.
Compound NPK fertilizer is recommended at the germination stage to promote germination, like Haizhuangyuan common formula fertilizer combined with NPK 21-12-21 water soluble fertilizer.
More potassium fertilizer and less nitrogen fertilizer should be applied at the pre-flower stage and full bloom stage, Haizhuangyuan common formula fertilizer combined with NPK 16-6-32 water soluble fertilizer is recommended tobrighten flower colors, allow for larger buds, and thicken the petals.
Seawinner extra 30 can be applied by foliar spray to improve bud quality and flower color at the whole growth stage.Solutions: