What fertilizer is good for gardenia?

What fertilizer to use for gardenia

Gardenia likes fertilizer. If it lacks nutrition, its growth rate will slow down and it is uncertain whether it can bloom. Therefore, when it is just planted or repotted, you can put some bean cake fertilizer or animal manure at the bottom of the pot to lay a solid foundation for the growth of gardenia.

(1) Liquid nitrogen fertilizer: Gardenias gradually sprout and enter the growth stage. At this time, you can apply liquid nitrogen fertilizer or compound fertilizer with a high nitrogen content every 10 days. This will enable new buds to sprout quickly. At the same time, in order to prevent the soil from being too alkaline, you can also appropriately add some ferrous sulfate solution.

(2) Phosphorus and potassium elements: When the gardenia is about to form buds, it is necessary to use fertilizers mainly containing phosphorus and potassium elements. This can promote the differentiation of flower buds and make the flowers bloom more beautifully. Apply fertilizer 2-3 times a month. Stop fertilizing when the buds turn white and are about to bloom to prevent buds from falling.

(3) Compound fertilizer : After the gardenia has finished blooming for the last time, you can apply compound fertilizer containing multiple elements 1-2 times to replenish the nutrients consumed during the flowering period. When the temperature is below 10℃ in winter, stop fertilizing and place it in a place with sufficient scattered light until the spring of the following year, then start fertilizing again.

How to fertilize gardenia

During the growing period of gardenia, apply decomposed human manure or cake fertilizer once every 10 days or so. Stop watering one day before fertilizing. On the day of fertilization, you can combine fertilization with watering.

Gardenias must be fertilized with thin fertilizers frequently. Add a small amount of fertilizer to the flowerpot each time to prevent the root rot of the plant. At the same time, do not fertilize when the weather is hot or when it rains for a long time. And each time you fertilize, sprinkle the fertilizer on the edge of the flowerpot, do not bury it near the roots.

Spring fertilization

Spring is the critical period for supplementing nutrients and fertilizing gardenias. You can use compound fertilizers such as nitrogen fertilizer, phosphorus fertilizer, and potassium fertilizer. Generally, it is applied once a month. When the fertilizer is replenished, the roots of gardenias can grow more vigorously. In mid-to-late April, you can add some phosphorus fertilizer and potassium fertilizer.

Summer fertilization

At the end of June, after the first batch of gardenia flowers have fallen, it is necessary to add foliar fertilizer in time. You can use organic liquid fertilizer. After the liquid fertilizer is diluted with water, it can seep into the soil with water and can be quickly absorbed by the gardenia.

Fall Fertilization

In autumn, gardenia should not be fertilized with only phosphorus and potassium fertilizers, nor can it be fertilized with only nitrogen fertilizers. The fertilization should be balanced. You can apply some multi-component fertilizers, such as some slow-release fertilizers.

Winter fertilization

Do not fertilize gardenia after winter, and continue to supplement nutrients until it sprouts in the spring of the following year. Placing the potted plants in a well-lit place on the balcony in winter can make the leaves of the gardenia greener.

Points to note when fertilizing gardenia

1. Pay attention to fertilizer damage : Gardenia likes fertilizer, but if too little fertilizer is applied, the plant will not have sufficient nutrition and the leaves will turn yellow. On the contrary, if too much fertilizer is applied, it will easily cause fertilizer damage and root burn, and the plant will also find it difficult to absorb nutrients.

2. Supplementary light : Gardenia prefers semi-shaded environment and is afraid of exposure to the sun. Yellow spots will appear under strong direct sunlight. Therefore, after fertilizing, it needs to be placed in a semi-shaded place for maintenance and given scattered light.

3. Organic fertilizer and nitrogen fertilizer from March to May : Generally from March to May every year, it is recommended that you sprinkle a small amount of organic fertilizer or compound fertilizer on the flowers of gardenia every other month to supplement nutrients such as nitrogen, phosphorus and potassium to promote the growth of branches and leaves of gardenia.

4. Phosphorus and potassium fertilizers from June to September: Gardenia enters the flowering period in June every year, so it is necessary to add phosphorus and potassium fertilizers in time. Water the flowers once every 15 days or so, and spray the leaves of gardenia at the same time, which will help the development of flower buds at the top of the branches.