Fertilizing potted flowers should be done at the right time and in the right amount according to the fertilizer habits of different flowers and the needs of different growth and development stages, temperature, light and seasonal changes, as well as the original fertility and texture of the pot soil.
It is very important to apply basal fertilizer. If the basal fertilizer is sufficient, you can apply less top dressing.
The organic fertilizer made after full fermentation is suitable as a base fertilizer for potted flowers. The usage is to mix 1 to 30% of the fertilizer into the culture soil, keep it moist, so that the fertilizer and soil are fully integrated, and use it after 2 to 3 months in winter or high temperature season. According to different ingredients, soil can be used for potting, inverting or repotting different flowers. Anglers and poultry feathers are used as base fertilizer, which can be placed directly on the bottom of the pot when the flowers are potted. Oil meal fertilizers such as soybean cake and bone meal are used as base fertilizers in the same way as similar fertilizers, and the dosage when incorporated into the culture medium is 3% to 5%. For flowers and trees that are not repotted that year, you can also open a circular trench along the edge of the pot when the flowers and trees are dormant, apply some fermented organic fertilizer, and then cover them with new culture soil, or you can replace the application of base fertilizer. Inorganic fertilizers such as phosphate fertilizers can use 0.5% superphosphate and phosphate rock powder, nitrogen fertilizers can use 0.2% sulfuric acid and 0.1% urea, and potassium fertilizers can use potassium sulfate and potassium chloride 0.1%. They are mixed into the culture soil as base fertilizer two weeks ago.
Applying top-dressing fertilizer During the growing season of flowers and trees,black plastic pots for plants applying thin liquid fertilizer to make up for the lack of base fertilizer is called top-dressing fertilizer.
Mix 1 part of fermented urine, bean cake water, fish intestine water, rice water, etc. with 10 to 20 times of water, or use urea or potassium dihydrogen phosphate to make a 0.1% to 0.2% aqueous solution, once a week Apply 1 to 2 times, and apply once every half month after the beginning of autumn. When applying top-dressing fertilizers, you must master the following: apply more nitrogen and potassium fertilizers during the vegetative growth period, and apply more phosphorus fertilizers during the flower bud formation period. The soil should be loosened the day before fertilization, and the morning after fertilization should be watered; Apply after the beginning of spring, but not after the autumnal equinox; apply before rain or on sunny days, but not after rain; apply when the climate is dry, but do not apply during the rainy season; apply when the pot soil is dry; do not apply when the pot soil is wet; apply more when the climate is suitable for vigorous growth. , do not apply when the climate is hot and the growth is stagnant, and do not apply when newly planted, leggy, or dormant; apply thin fertilizer frequently, and do not apply heavy fertilizer; for chrysanthemums and jasmine that like fertilizer, apply more from light to thick, and can tolerate barren five needles. For pine and other conifers, it is better not to apply too much; apply before and after flowering, and do not apply during the peak flowering period; apply in the morning and evening, but not at noon; apply more to strong seedlings, and less to weak seedlings; do not be too hungry or too full ;Do not apply if it is not decomposed or diluted.
Extra-root top dressing: Spray a chemical fertilizer solution on the top and bottom of the leaves to make up for the lack of fertilization in the root system. This is called extra-root top dressing.
Due to increased fertilizer absorption, plants grow robustly, with green branches, colorful flowers, and enhanced disease resistance, but it cannot replace soil fertilization. Only inorganic fertilizers such as urea, sulfuric acid, potassium chloride, superphosphate, and potassium dihydrogen phosphate that are easily soluble in water can be used in the morning and evening in weather with low temperature and high humidity. High temperatures make it easy to dry out and cannot be absorbed. The appropriate depth is 0.1%~0.2%. If it is too light, the fertilizer effect will be low, and if it is too thick, it will be difficult to absorb.