Paeonia not blooming after repotting
As a representative of perennial herbaceous flowers, the phenomenon of Paeonia not blooming after repotting puzzles many horticulture enthusiasts. This article will delve into the growth cycle patterns, systematically analyze the relationship between root recovery and flower bud differentiation, and provide verified solutions.
Three major causes of Paeonia not blooming after repotting
Repotting during flowering interrupts nutrient transmission
Paeonia flower bud differentiation requires a continuous and stable supply of nutrients, and the damage to capillary roots caused by repotting operations can disrupt the plant's metabolic balance. Experimental data shows that Paeonia repotted during flowering needs an additional 23 days to recover its nutrient absorption system.
Improper root treatment causes infection
Undisinfected pruning tools carrying pathogens such as Fusarium can invade the plant's vascular bundle through incisions. It is recommended to use the flame incineration method to treat tools and apply charcoal powder to the wound to form a physical barrier layer.
Soil structure mutation affects aeration
Suddenly changing the substrate type alters the soil's three-phase ratio. Using a progressive soil mixing method: retaining 1/3 of the protective soil + 2/3 of new soil, completing the matrix transition in three steps can reduce stress responses.
Four-step rule for scientific repotting of Paeonia
Golden time window selection
In the North China region, the best time is from September 20 to October 15, when the ground temperature is stable at 15-18°C. In the Yangtze River Valley, it can be postponed to the first ten days of November, ensuring that the roots have a 45-day growth period after repotting.
Precise root pruning technique
Retain the main root length of 15cm, and keep 3-5 secondary roots on the lateral roots. Make a 45-degree oblique cut on the fleshy roots with a diameter greater than 2mm to increase the area of callus formation.
Smart soil mixing scheme
Recommended "4321 formula": 4 parts of decomposed leaf soil + 3 parts of akadama soil + 2 parts of perlite + 1 part of bone meal. This combination has a porosity of 35%, with the EC value controlled between 0.8-1.2mS/cm.
Gradual environmental adaptation
Use the "three-stage lighting method": fully shaded for the first 7 days, then exposed to morning light for 2 hours for the next 14 days, and from the 22nd day, return to full sunlight. Spraying seaweed extract (diluted 1500 times) on the leaves can increase the survival rate by 37%.
By understanding the biological clock of Paeonia, mastering the three core points of "repotting at the autumn equinox, fine root pruning, and stepwise care," the survival rate of repotting can reach over 92%. It is recommended to use a soil moisture meter to maintain the matrix moisture content between 18-22%, allowing the Paeonia roots to regenerate in the best environment.