Causes of Yellowing, Wilting Leaves in Gardenias and How to Fix Them

Gardenias not only have a fresh, delicate fragrance and beautiful petals that bring great joy to anyone who sees them, many people keep a pot at home, as both an ornamental plant and a completely natural air freshener, but friends who grow them find that they are especially prone to yellowing leaves and wilted flowers, which is very upsetting to see. To help with these problems, here are a few handy tips.

What to do when gardenia leaves turn yellow

1. Yellowing leaves caused by overwatering

When gardenia leaves turn yellow from overwatering, the young leaves look dull yellow and lack shine, the old leaves show no obvious change, the stems are thin and yellow-green, and the new shoots shrink and stop growing, all of which shows that the plant is being overwatered. Take the plant out of its pot, place it in a ventilated, shady spot to let the root ball dry out on its own, then put it back in the pot.

2. Yellowing leaves caused by drought

Yellowing from lack of water is different from yellowing from too much water. Yellowing from lack of water shows as withered, dry leaf tips or edges, with old leaves turning yellow and dropping from the bottom up, but new leaves growing fairly normally. Just make sure to water thoroughly and deeply.

3. Yellowing leaves caused by direct strong sunlight

Strong direct sunlight falling on some shade-loving flowers (such as spider plants and hostas) easily causes the leaf tips and edges to wither, with yellow patches appearing on the sun-facing part of the leaves. Just move the plant to a shady spot.

4. Yellowing leaves caused by lack of light

If the plant is kept in a shaded environment for a long time, the leaves cannot get enough sunlight and cannot form chlorophyll, so the whole plant's leaves turn yellow and then drop. Adding light can prevent this problem.

5. Yellowing leaves caused by too much fertilizer

Yellowing caused by too much fertilizer or too strong a concentration shows as dry brown tips on the new leaves, usually with thick, dull leaves that are uneven and do not spread out smoothly, while the old leaves turn scorched yellow and drop. Stop fertilizing immediately, and in serious cases flush out some of the fertilizer with a large amount of clean water.

6. Yellowing leaves caused by lack of fertilizer

When gardenia leaves turn yellow from lack of fertilizer, the young leaves become paler, turning yellow or light green, while the old leaves stay fairly normal or gradually turn from green to yellow. Check the potting soil; if it has become dry and hard, replace the soil, and usually apply light fertilizer frequently and water with some alum solution at the right times.

Causes of wilting gardenias and how to fix them

Replace all the nutrient soil in the pot with garden soil or another kind of soil; it must be soil, not the so-called nutrient soil sold by some flower sellers that is black and looks like a net-like material. That is not soil, it cannot hold water, so your flowers wilt after a few days, which is actually a sign of lack of water. After replacing the soil, water thoroughly, preferably doing the repotting at night.

How to grow gardenias in water

1. Choose strong, healthy branches. This step determines how well the plant grows. For water-grown gardenias, you can choose a branch with a thick main stem and at least three small branches growing from that one main stem; such a gardenia will be more beautiful.

Because gardenia branches may carry insect eggs, to avoid insects appearing during water growing, first wash the gardenia branches clean, being careful not to damage the outer skin.

The branches for water growing need to have overly dense foliage and leaves that have been chewed by insects trimmed off, and larger leaves cut crosswise by more than half, to prevent water from evaporating too quickly, which would make the gardenia leaves wilt and wither.

2. Cut the tip of the gardenia branch into a horse-ear shape, soak it in a 0.1% potassium permanganate solution for 4-6 hours, then take it out and put it in clean water, with the part in the water being 1/3 of the total length of the cutting.

3. Water-grown gardenias need a brown bottle as a container, with the water changed once every 1-2 days. You can also drill small holes in a wooden board or foam board, insert the cuttings into the holes, and then let it float on the water surface, with 2/3 of the cutting length left above the floating body and 1/3 inserted into the water. After the water-grown gardenia grows new roots, move it from a dark place to a bright place. When the roots reach 1.5-2 cm and a single plant has 6-7 roots, it can be transplanted into a pot or planted in the ground.

How to water gardenias

1. In spring and summer, water normally in the morning. When the temperature is higher, after the sun sets, that is, when we get home from work, spray water on the leaves. When spraying, note that the nozzle flow should be a bit stronger, do not use a mist, and do not spray the flowers that have already opened. After spraying, make sure there is good ventilation.

2. From April to September, water by the rule of "dry then wet": do not water every day, to avoid the plant developing water-induced yellowing and yellow leaves.

3. In July and August the weather is dry, water evaporates quickly, and the soil easily dries and hardens. Depending on the soil condition, you can water every day. The day after watering, loosen the soil appropriately according to the soil condition. If the soil is still very wet several days after watering, increase ventilation, and when repotting the next year, pay attention to the soil ratio.

If you want your gardenia to bloom well, besides fertilizer, watering is also very important. Different seasons and different periods call for different methods, so we must pay close attention, otherwise we may water too much or not enough, and both will affect its growth. In addition, our gardenias can be grown not only in soil but also in water, so you can give that a try too.