When is the best time to transplant northern peony flowers
Today's little experience in life brings me about when is the best time to transplant northern peony flowers and the relevant experience in planting flowers that are afraid of freezing. The following small series provides you with a detailed explanation of the best time to transplant northern peony flowers is from mid-September to October in autumn. In mid-October, the temperature at this stage is suitable (15-25℃) and the ground temperature is stable. The plant has accumulated sufficient nutrients and entered the pre-dormancy root restoration period, which can ensure normal flowering in the following year. As a cold-resistant plant, peony can tolerate low temperatures of-20℃, but seedlings and newly transplanted plants need to take anti-freezing measures, such as soil on roots and necks, covering straw or building wind barriers.
1. Selection of transplanting time for northern peony 1. Core advantages of transplanting in autumn ① Physiological activity matching: After September, the above-ground part of the peony stops growing, and nutrients are concentrated in the root system. At this time, transplanting has the least interference on plant metabolism.
② Root recovery period: The rooting period 15-20 days after planting is the appropriate period for the temperature difference between day and night in the north (18-25℃ during the day/10-15℃ at night) to promote the formation of callus.
③ Adequate preparation for overwintering: Go through the complete winter low-temperature vernalization process (it takes more than 600 hours of low-temperature accumulation at 0-5℃) to ensure the normal differentiation of flower buds.
2. Transplanting risks in other seasons Spring (March-April): Breaking the growth cycle leads to "stiff seedlings." Practice in Beijing shows that the flowering rate of spring transplanted plants drops by 62% the next year.
Summer: High temperature makes the root system dormant, the transplant survival rate is less than 30%, and it is easy to cause root rot.
2. Antifreeze Management Technology for Northern Peony 1. Cold resistance grading standard ① Adult plants over 4 years old: safe overwintering from-15 to-20℃ (no special protection required) ② 2-3-year-old plants: critical value of-10℃ ③ Transplanted seedlings in the same year: -5℃ requires protection 2. Stepped anti-freezing solution 丨 Basic protection (Areas above-10℃): -Root and neck soil: Pile up a mound of 50cm in diameter with a height of 15-20cm-Cover with crushed pine needles or rotten leaves with a thickness of 5cm in thickness ③ Strengthen protection (areas at-15℃): -Sandwich method: Lay mulch film on the bottom layer (moisture proof)+10cm straw in the middle layer + outer non-woven fabric-Wind barrier Construction: A 75cm tall straw board 1 meter to the north side of the plant ③ Extreme protection (below-20℃): - Overall package: Wrap the whole plant with breathable cold-proof felt-snow utilization: artificially maintain a 20-30cm snow layer 3. Key steps of transplanting operation 1. Prepare beforehand √ Stop fertilizer and water control 30 days in advance √ Prepare disinfection tools (soak in potassium permanganate 1:1000) 2. Seedling lifting specifications ① Keep the diameter of the soil ball ≥40cm (adult plant) ② Trim and keep the main root 20cm and the fibrous root 15cm ③ Apply plant ash + sulfur powder to the wound (3:1 mixture) 3. Technical points of planting] Hole specifications: depth 50× width 60cm (clay area needs to be expanded by another 20%) ○ Substrate formula: -5 parts garden soil +2 parts decomposed sheep manure +2 parts river sand +1 part bone meal- pH adjustment: Add sulfur powder (0.5 kg per cubic meter of soil, 0.5 units reduced by 0.5 units) ○ Planting depth control: -Grafted seedlings: The interface is 3 cm lower than the ground surface-rafted seedlings: The root and neck are flush with the ground 4, maintenance sequence after transplanting 1. Water management ● Root fixing water: Pour thoroughly immediately after planting (warm water at 20-25℃ is preferred) ● Overwintering water: Pour thoroughly 7 days before soil freezing (before November 15 in the Beijing-Tianjin-Hebei region) 2. Temperature response standard ① Start covering at 5℃ ② Continue to cover at-10℃ for more than 48 hours, check the covering layer ③ Gradually remove the cold protection around March 5 in spring (average daily temperature>5℃) 3. Observation indicators during the recovery period ③ Success signs: Red dormant buds form in winter ③ Risk warning: Black shoots in spring (signs of freezing injury) 5. Treatment plan for special areas 1. Northeast cold region (central Heilongjiang) ★ Recommended container planting: move into a-5 - 0 ℃ cold room in winter ★ If necessary, drip irrigation system prevents dry freezing 2. In the Loess Plateau, water seepage holes are opened on the side walls of planting holes (to prevent water accumulation). Combined use of plastic film mulching + soil pressing Note: All farming operations need to be adjusted in conjunction with local phenology. Shenyang usually needs to operate 10-15 days earlier than Beijing. Through standardized transplanting and scientific protection, the overwintering survival rate of northern peonies can reach more than 98%, achieving the high-quality cultivation goal of "crown width exceeding 1.2 meters three years after planting."
Do you understand the above detailed introduction of when is best to transplant northern peony flowers and whether they are afraid of freezing?