What Fertilizer to Use for Ground-Planted Roses in Spring
As a classic garden flower for courtyard landscaping, the spring maintenance of ground-planted roses directly affects the quality of flowering throughout the year. In the spring when everything revives, scientific fertilization can provide roses with the necessary nutrients for growth. This article will systematically analyze the key points of spring nutrition management for ground-planted roses, from fertilizer selection to operational skills.
Key Points of Spring Fertilization for Ground-Planted Roses
1. Scientific Application of Compound Fertilizer
It is recommended to use a slow-release compound fertilizer with an N-P-K ratio of 15-15-15, with an amount of 50-80 grams per plant. Use the annular trench method, dig a circular fertilization trench about 15 cm deep at a distance of 30-40 cm from the main stem, evenly spread the fertilizer, and then cover the soil and compact it.
2. Auxiliary Fertilization Techniques
Before fertilizing, it is necessary to deeply loosen the soil to break the compacted layer to a depth of 20 cm to enhance soil aeration. It is recommended to use organic fertilizers such as decomposed cow dung (3-5 kg/plant) alternately with compound fertilizer at an interval of 7 days. After fertilizing, immediately water thoroughly to promote nutrient dissolution and absorption.
Four-Season Fertilization Management Strategy
1. Summer Fertilization Control Plan
When the temperature continuously exceeds 30℃, root fertilization should be suspended. It is advisable to spray 0.2% potassium dihydrogen phosphate foliar fertilizer every half month, combined with amino acid water-soluble fertilizer (diluted 1000 times) for foliar supplementation, to be applied in the early morning or evening.
2. Autumn and Winter Supplement Fertilization Techniques
In September and October, apply high phosphorus and potassium fertilizer (10-30-20) to promote lignification, with a reduction of 30% in the amount compared to spring. Before winter, apply decomposed sheep dung (2-3 kg/plant) as a base fertilizer, combined with bone meal (100g/plant) to enhance cold resistance.
Rational fertilization needs to be adjusted according to the plant's growth, with newly planted seedlings having a 30% reduction and an increased proportion of organic fertilizer. By establishing a scientific fertilization calendar, combined with regular soil loosening and water management, the roots of ground-planted roses can develop, achieving continuous blooming results.