The invention belongs to the technical field of
dahlia cultivation, and particularly relates to a
dahlia dwarfing treatment method. A dwarf variety is adopted,
cutting seedlings are selected, and theaperture of a pot for an initially-planted
seedling is 8-12 cm. When the height of the seedlings reaches up to 15 cm, the seedlings are planted in a large pot with the
caliber of 22-28 cm; soil for
potting is prepared by uniformly mixing 4-5 parts of garden soil, 3-5 parts of
river sand and 2-3 parts of
compost soil, coarse sand with the thickness of 2-3 cm is spread on the pot bottom, 0.1 part ofdecomposed cake
fertilizer powder is added on the coarse sand, and culture soil with the thickness of 0.1-0.2 cm covers the decomposed cake
fertilizer powder, thenseedlings with soil lumps are planted, watering is conducted in the
growing season when
dryness and wetness appear, illumination needs to be conducted for no less than 8 hours every day in the growing period, thin cake
fertilizer liquidneeds to be topdressed once every half a month in the growing process, after
budding, the thin cake fertilizer liquid is applied once every week, and
monopotassium phosphate liquid with the concentration of 0.2% is sprayed once or twice. The method has the advantages that the operation is simple, the obtained
dahlia pinnata has high ornamental value, and the height of the dahlia pinnata after
dwarfing treatment is 30-40 cm; the method has remarkable
economic benefits and is worthy of being widely popularized.