What about the yellow leaves of cycads? how to water and fertilize cycads?

Iron tree should be a very strong species, cycad, as a kind of iron tree, should inherit this characteristic of iron tree, but there are times when iron people get sick, and iron tree is no exception. Cycad leaves yellowing and overgrown leaves are all possible problems in the process of cycad growth, but such problems can be improved by improving breeding methods.

What if the cycad leaves turn yellow?

1. Lack of light

In the period of cycad growing new leaves, it is necessary to maintain the whole sun until the leaves harden and then move to the semi-shade. If sufficient light is not guaranteed during the growing period, it is easy to cause the leaves to turn yellow.

2. Improper watering

Improper watering can be divided into two cases: overwatering and underwatering. In the growth period of the new leaves of Tieshu, it is necessary to provide sufficient water, but do not let the basin soil wet for a long time, otherwise the roots are easy to lack oxygen, resulting in poor plant growth, and then the leaves are yellowed. Of course, lack of water can also cause leaves to yellow. the specific characteristics are that the leaves turn yellow from the bottom up, and the old leaves turn yellow first. if they are not watered in time, the leaves of the whole plant will turn yellow and even die.

3. Improper fertilization

If you apply too much fertilizer, or if the concentration of fertilizer is too high, it will also cause the cycads leaves to turn yellow. The young leaves are thick and glossy, and the surface is uneven. The solving measures are to control the use of fertilizer, middle ploughing and proper watering. If the young leaves and tender stems of Cycas begin to yellowing first, it is likely to be caused by insufficient fertilization and long interval of fertilization. At this time, it is necessary to apply fertilizer in time, otherwise it will lead to yellow leaves and even death of the whole plant. It should be noted that a large amount of heavy fertilizer should not be applied at one time, otherwise it will cause root burning.

4. Soil alkali.

Cycads like slightly acidic sandy soil, soil alkalization will also make cycads leaves yellow, you can use ferrous sulfate solution 500 times the solution to irrigate basin soil, once a week, continuous irrigation several times, can alleviate the yellowing degree of leaves.

5. Diseases and insect pests

Diseases and insect pests are also one of the reasons for the yellowing of cycad leaves. Carefully observe whether there are red spiders and shell insects on the leaves and spray them in time for corresponding control. If macula appears on the leaves, carbendazim can be sprayed to kill bacteria.

How to water and fertilize cycads

I. Water and fertilizer management of cycads

When the new leaves of cycads grow, it is important to control water and fertilizer, which is related to the shaping of the leaves. Generally around June, cycads begin to sprout new leaves, at this time the water needs to be strictly controlled, so that the leaves can grow slowly and do not apply too much fertilizer, so that the purpose of leaf control can be achieved. generally wait until the leaf growth has been finalized, in the normal water and fertilizer management.

In addition, in the spring and summer plum rain season, we need to pay attention to prevent Rain Water, because too much Rain Water will lead to excessive growth of cycads leaves.

II. Fertilization methods of Cycas

From March to September every year, thin liquid fertilizer is applied to cycad plants once a week to promote the growth of leaves. After entering autumn, fertilizer can be applied 1-2 times a month during the growing period, and remember to follow the principle of "eat less and eat more" during fertilization. During the growth period of cycads, the roots of cycads should be fertilized once a month, mainly with complete fertilizer of nitrogen, phosphorus and potassium, and an appropriate amount of phosphorus, potassium and iron fertilizer. You can use 30-40 grams of nitrogen, phosphorus and potassium compound fertilizer, 5-10 grams of ferrous sulfate and 10-15 grams of potassium dihydrogen phosphate, mixed with clean water and directly applied to the basin soil.

In addition, the mixture of 0.1% zinc sulfate, 0.1% magnesium sulfate, 0.1% ferrous sulfate, 0.2% urea and 0.3% potassium dihydrogen sulfate can be evenly sprayed on the leaf surface every 7-10 days. It is better to start dripping with water droplets, which can effectively supplement trace elements and nutrients to cycads and promote branches and leaves to be more green.

How to plant cycad seeds

1. Sand storage treatment of cycad seeds.

The sand storage treatment of cycad seeds is generally carried out around December, and the appropriate temperature and humidity should be maintained during the sand storage period. The suitable temperature for growth is about 18-25 ℃, and the humidity should be kept at 80-90%. At the same time, do a good job of heat preservation. The seeds will germinate in May or June of the following year, and a true leaf will generally grow in July and August.

2. Preparation of Cycas before sowing

After harvesting full and healthy cycad seeds in October, soak them in warm water of about 50 ℃ and leave them for one day. Then soak in dilute hydrochloric acid, dilute sulfuric acid and other solutions for about 10-15 minutes, then rinse the seeds with clean water, and change the water every other day when soaking the seeds, until the seed coat is completely swollen and softened, the outer seed coat can be easily peeled off, the pulp can be removed, and the seeds can be stored after drying.

3. The sowing method of cycad

The treated seeds can be sown, and the cycad seeds are suitable for pot-on-demand sowing, and the depth of covering soil is about 2 centimeters. After sowing, the cycads can germinate in about two weeks at a temperature of 30-33 ℃. Cycad seedlings need to be cultivated for 2-4 years before transplanting.

What if the cycad leaves are too long?

1. Lack of light

The leaves of cycads are too long, in fact, the main reason is lack of light. In the placement of cycads, put it in a too hidden place, so that it can not be exposed to sufficient light, there will be excessive growth of leaves, thin and long, affecting the ornamental. If the leaves of cycads grow normally, they should be exposed to sufficient light, preferably in a sunny place indoors, not indoors.

2. Improper water and fertilizer

When raising cycads, if the water and fertilizer are not controlled properly, it is easy to have the phenomenon of excessive growth of leaves. The reason may be too much watering, no timely water control, or too much fertilization, especially during leafing.

When the leaves of cycads are growing, they should not be watered too frequently, usually once every 10 days, and can be sprayed frequently. Don't fertilize too often or too much. Generally, after the leaves of cycads are mature, water and fertilizer management is carried out normally.

The problems in the process of plant growth are basically out of harmony with the growth environment, the inadaptability of light, heat, water and fertilizer, or the harm of diseases and insect pests, and so on. So we only need to think about the problem from the perspective of the environment, and we can basically find the answer to the question.