When to Apply Nitrogen Fertilizer to Flowers? A Detailed Guide to Nitrogen Fertilizer Types

Nitrogen fertilizer is a chemical fertilizer containing the crop nutrient element nitrogen. Elemental nitrogen plays a very important role in crop growth. So when should you apply nitrogen fertilizer to flowers? What types are there? Let's take a look below.

When should you apply nitrogen fertilizer to flowers?

Nitrogen fertilizer mainly promotes the growth of flower stems and leaves, but if it exceeds the plant's growth needs, it will delay flowering, cause the stems to grow excessively, and weaken resistance to disease. Annual flowers need less nitrogen fertilizer at the seedling stage, and their demand gradually increases as they grow. Biennial flowers and perennial flowers need a large amount of nitrogen fertilizer at the beginning of spring growth, and this demand should be met. Flowering flowers and foliage flowers have different nitrogen fertilizer requirements. Foliage flowers need more nitrogen fertilizer throughout the entire growth period, to ensure that the foliage remains attractive over a longer period; for flowering types, more nitrogen fertilizer is only needed during the vegetative growth stage, and once they enter the reproductive stage, its use should be controlled, otherwise the flowering period will be delayed.

What nitrogen fertilizers are there for growing flowers?

1. Pour the waste oil from the range hood's oil collection box along the edge of the flower pot into the soil; it is suitable as flower fertilizer for hibiscus, jasmine, impatiens and others.

2. Crush spoiled glucose powder and sprinkle it around the soil in the flower pot; after three days the yellow leaves turn green and growth becomes vigorous. This method is suitable for spider plants, crown of thorns, lucky bamboo and Monstera deliciosa.

3. Fruit peels and rotten vegetable leaves. Mix them directly into two-thirds sandy soil, or put them into a small bucket, pot or jar and seal the opening tightly with mud, and compost them into humus soil; this can be used directly for planting flowers or applied as a top dressing flower fertilizer.

4. Chicken and duck feathers, pig bristles, hair, and livestock hooves and horns. Buried directly into the flower pot or soaked and composted, they are all very good phosphorus and potassium fertilizers, and the fertilizer effect can last more than two years.

5. Chinese medicine residue. It is a clean flower fertilizer with high nutrient content; mixed onto the surface of the potting soil, it can improve the potting soil and keep it moist. If soaked and composted into fully rotted fertilizer water, the fertilizer effect is even better.