Dahlia Liquid Fertilizer HighTech NPK, Root Soil Foliar Fertiliser - Professional Plant Food (Made in Germany). Dahlias require low nitrogen fertilizer. We recommend using a fertilizer with a higher percentage of potassium and phosphorus. The best dahliafertilizer is one with only a little nitrogen due to their sensitivity to it. When shopping for fertilizers, you'll notice that they all have an NPK ratio on the front. DahliaFertilizer Needs. Healthy tubers are the first step to vigorous dahlia bushes. Choose tubers that are free from blemish, chubby, and have plenty of growth eyes or nodes. Fertilization of dahlias: How to use Haifa's fertilizers | Read More.Growing Practice. Fertilization Methods. Nutrigation™. Foliar Feeding. Best types of fertilizer for dahlias. In the Petals & Roots video above, I talk about using a high potash feed for dahlias, so let me expand on this. The plant nutrients dahlias need to produce... 2. No fertilizer is needed to start dahlias, usually the root has adequate nutrients needed to start the plant and until there are feeder roots the fertilizer is of no value. DahliaFertilizer - Type, when, and how much fertilizer should I use to get bigger and better blooms on my dahlia plants? Get the facts here. Dahlias are heavy feeders from the start, so don’t wait until you see growth to apply an initial dose of fertilizer. At the time of planting is the time to get started.
