How to grow potted chrysanthemums so they bloom profusely and how to prevent and control rust disease?

The chrysanthemum is a very famous ornamental flower with a great many varieties, cultivated all over the world. Chrysanthemums can be planted in the open ground or grown in pots in courtyards, and they carry the meaning of good fortune and longevity. Let's take a look below at how potted chrysanthemums can bloom profusely and how to prevent and control rust disease.

1. How can potted chrysanthemums bloom profusely?

1. Key points of fertilizing

Because during the period when chrysanthemums bloom, their fertilizer demand is relatively large. Normally, during their peak growing season, if the fertilizer supply cannot keep up, yellow leaves will appear and the plant may even stop growing.

When it is preparing to bloom, if the fertilizer supply cannot keep up, its flower buds will correspondingly decrease, and when it blooms the flower heads will also become smaller, and the number of blooms will correspondingly decrease.

If you want to apply fertilizer to it, try to apply fertilizers containing the three elements nitrogen, phosphorus and potassium mixed together. For example, for nitrogen fertilizer we can use soybean water, for phosphorus fertilizer use bone meal, and for potassium fertilizer use water fertilizer made from fermented fruit peels.

2. Pay attention to protecting against pests and diseases

Normally when watering the flowers, you can add some tobacco-soaked water, garlic water, chili water, etc. to the water. Watering the chrysanthemums with this will make the plant itself produce antibodies, thus avoiding damage by aphids.

If it is especially severe, then cut off the branches where pests are most concentrated, destroy them and throw them away, to avoid infecting other healthy branches, and then wash off the remaining scattered aphids.

3. Light

Chrysanthemums grown in pots should be kept in a position with sufficient sunlight as much as possible, so that their blooms stay splendid. Some friends keep the potted chrysanthemums they bought indoors for a long time; although there are many flower buds, without enough light the buds cannot open normally, and the buds will keep dropping and rotting.

The position where potted chrysanthemums are kept should ideally have about 5-6 hours of direct light each day. Give plenty of light in the morning, and in summer afternoons provide appropriate shade, to avoid the light being too strong and scorching the flowers and leaves.

2. How can potted plants prevent and control the appearance of rust disease?

Chrysanthemum rust disease mainly harms leaves and stems. When it first appears, small light-yellow spots can be seen on the leaves, and small chlorotic spots also appear at the corresponding places on the undersides of the leaves. Later, slightly raised blister-like objects form; after the blister-like objects rupture, large amounts of yellow-brown powdery material are released. After chrysanthemums become infected, their growth becomes very weak, and they do not bloom or drop a large number of flowers. If there are many disease spots on the leaves, the leaf edges curl upward, and a large amount of dieback occurs.

1. For potted chrysanthemums, clear the drainage holes or openings at the bottom of the pot to prevent water from accumulating in the pot. When planting, the potting soil should be fertile, well-drained, slightly sandy soil. Appropriately increase the application of phosphorus and potassium fertilizers to improve disease resistance.

2. After the disease occurs, immediately remove the diseased leaves and clear out severely diseased plants, burying them deeply in a centralized way, in order to control spread and extension.

3. Chemical control. In the early stage of the disease, spray 1:1:200 Bordeaux mixture, or 65% zineb 500 times dilution, or lime sulfur mixture at 0.3-0.5 degree solution, or 15% triadimefon wettable powder 1000-1500 times dilution, spraying once every 10-15 days, for 2-3 consecutive sprays.