Key 1 - yellow leaves, what should I do

In summer, gardenia is most prone to yellowing, wilting and scorching leaves in the maintenance process. There are three main reasons: water yellow, fat yellow and iron deficiency

Water yellow

Performance: from bottom to top, old leaves first yellow, followed by new leaves; The whole leaf gradually turns yellow from veins

Reasons: 1. Watering too much, too often and ponding; 2. The pot soil is too wet and sticky, and the air permeability of the flowerpot is poor; 3. The bottom leaves are too dense and not ventilated

Solution: put Gardenia in a cool and ventilated place, trim too dense and too long branches and leaves, and increase ventilation. If the root system has rotted, replace the soil and basin immediately, and select the mud tile basin with good air permeability

Fat yellow

Performance: the old leaves and veins turn yellow first, and the whole piece turns yellow gradually

Solution: in case of fertilizer yellow, change the blister basin for many times, or irrigate the roots with long water for about half an hour, and dilute the excessive fertilizer in the soil

Iron deficiency

Manifestations: iron deficiency yellowing is a yellowing disease. The leaves are light yellow or white green, the veins are still green, and the whole leaves are yellow white or even dry and fall off seriously

Solution: in case of iron deficiency, spray retted alum fertilizer water or 0.1% ferrous sulfate

Key 2: how to wilt

Gardenia grandiflorum, which has just been bought back from the greenhouse or flower market, is most likely to wilt. The main reason is that the leaves are large and dense, the air humidity is too low, and the water transpiration is too fast

solution: Gardenia needs larger air humidity, first trimmed over dense branches and leaves, then spray 2~3 times around the leaves every day to keep moist. p>

Key 3: what to do if the flower buds fall off

Potted gardenia is most likely to drop flowers in summer bud stage

Solution:

1. Do not spray wet flower buds when watering at bud stage

2. The pot must not be changed at the bud stage, which is easy to hurt the root system

3. When the soil is alkaline, spray the mixture of diluted vinegar and ferrous sulfate

Gardenia maintenance skills

1. Soil

Gardenia relies on acid soil with strong permeability and good drainage, general pine needle soil and rotten leaf soil, mixed with fine sand and stone

2. Watering: Gardenia likes moist air and avoid ponding and waterlogging. Watering shall follow the principle of seeing dry and seeing wet. When the temperature is high in summer, the basin soil can be poured shallow to wet without pouring through with large water

3. Light: Gardenia is a strong positive flower, which has high requirements for light and ventilation. Keep 50% ~ 60% of the southern light every day to avoid direct strong light; When the temperature of Gardenia grandiflorum rises to more than 30, it must be shaded by 50% outdoors, or it can be dried in the morning and evening and shaded at noon

4. Fertilization: Gardenia likes fertilizer, but the newly raised Gardenia will not be applied with any fertilizer. After the slow seedling period, apply fertilizer such as retreaded soybean cake, sesame paste residue, peanut bran or potassium dihydrogen phosphate every 1 ~ 2 weeks. No fertilizer is applied above 35 ℃ in summer and below 15 ℃ in autumn

In addition, watering Gardenia with thoroughly fermented rice washing water and peel water can not only increase nutrients, but also soften the soil, take into account acid regulation, which is beneficial and harmless to flowering

5. Pruning: during the vigorous growth period from May to July, prune the long branches at the top and the dense branches at the bottom to increase ventilation. After the flower bud grows, leave 2 ~ 3 thick branches and 1 weak branch, and cut off the rest of the flower bud and the surrounding idle leaves; After withering, trim the remaining flowers, dead branches and old leaves at the lower part of the flower branches

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