The reason the leaves and stems of jade plants turn black is due to root rot, caused by wet soil around the roots or high humidity. Black spots on the leaves of jade plants are called edema and are caused by overwatering and slow soil drainage.
Read on to find out under what conditions your Jade plant turns black and how to save it…
Excessive watering promotes rot which darkens the jade
jade plants are From South Africa where the rocky slopes grow on dry soil and full sun and with weird rain.
Jade plants are specifically adapted (with their thick leaves) to grow in near-desert environments with low humidity and very fast-draining soil.
Therefore, Jade is very sensitive to overwatering when grown by gardeners, which can cause signs of stress such as:
- Black spots on the leaves. (edema).
- black leaves (rotten root).
- black rods (rotten root).
Small black or brown spots on jade plants are edema caused by excessive water absorption at the roots, which is faster than the rate of transpiration (water loss) through the leaves.
The black leaves and stems are caused by root rot, a fungal disease.
Black spots on leaves and stems are caused by excess moisture around the roots, of which overwatering is often the main cause.
Since jade plants are drought-tolerant plants, it is important to do this. reproduce the original environmental conditions water them less frequently.
How to save it.
Reduce the watering of the Jade plant so that the soil dries out between waterings.
To determine this, a good test is to use a cocktail stick to poke the ground. If the soil on the stick is a little wet, let it water for a few more days. When the stick is dry, soak the jade plant well.
Jade plants prefer a watering schedule of one water well so water drips from the bottom of the pot, followed by a period to allow the soil around the roots to dry out as it mimics the natural conditions of a downpour followed by a drought.
(Read my article how to water jade plants for how often and how much to water jade for your climate).
Jade plants are hardy and can recover from black leaf spots once you have a more appropriate water regime.
The leaves may recover on their own, but if there are other causes of excessive soil moisture (such as slow-draining soil), the plant may suffer and possibly rot.
If the leaves and stems turn black, it is probably root rot.
Prune back all black leaves and stem parts to prevent rot from spreading through the plant to save the jade plant.
It can be difficult to revive jade plants once they have rotted, but one way to ensure recovery is to cut healthy green leaves or parts of the plant that are not contaminated with black marks to the reproduction.
Jades spreads easily and is extremely easy. Check out this handy YouTube video on how to propagate Jade…
Top Tips for Watering Jade Plants
- Water jade plants at the base of the plant rather than at the top. because if the leaves are wet from watering, this can reduce leaf transpiration and increase the risk of leaf blackening.
- aquamarine jade (when the ground is dry) early in the morning this gives the Jade plant the ability to drain excess water through the leaves during the day and thus balance its moisture content.
- Watering at night when the plant is dormant can let it rest in moist soil.increasing the risk of rot and black leaves.
- Considerably reduce watering in winter. because jade plants go into a dormant state and only need water once a month.
Slow-draining soils promote rot which causes black leaves and stems
Even if you overwater, it’s just as important to make sure the Jade is planted in the right, well-drained soil to avoid blackening of the leaves.
If your potting soil contains too much moisture, it mimics the same effect as overwatering with too much moisture around the roots, causing them to rot and blacken.
Jade plants prefer potting soil that mimics the soil-draining properties of its rocky South African habitat.
If your Jade plant is planted in undisturbed compost, this is likely the cause of rotting or black spots on its leaves.
Jade plants require specific potting soil formulated for succulents and cacti (which are widely available at garden centers and on Amazon).
Specialty potting mixes have the exact drainage characteristics with a precise grain size that allows water to drain quickly from the roots of your Jade and minimizes any risk of rot.
This reduces the risk of the leaves turning black and keeps the plant healthy.
As with a Jade plant that has been overwatered, it may be necessary to gently prune with sterile pruning shears to cut off any part of the Jade that has turned black to prevent the rot from spreading to other healthy parts of the plant. .
Removing healthy leaves and stem parts for propagation may be the only way to save your jade plant if it has been left too long in damp soil.
(For more information read my article How to revive a dying jade plant.).
With proper soil drainage and watering, the jade plant can remain healthy. live 100 years or more.
pots without emptying Make jade plants black
Jade plants turn black if planted in a pot without drainage holes in the bottom or if the drainage holes become clogged, preventing excess water from easily escaping.
Pots without drainage holes allow water to collect around the roots, causing root rot and blackening of the leaves and stems of the Jade plant.
Therefore, it is essential to transplant your Jade plant into a pot with drainage holes as soon as possible to avoid further damage and further blackening of the leaves.
However, it should be noted that pots without drainage are not the only pot-related reason why jade leaves turn black:
- Roots block drainage holes. Jade plants can have a very long lifespan, so if your jade plant has been in the same pot for a while there is a risk of the roots sticking to the pot and clogged roots blocking the hole. drainage, preventing water from escaping. and encourage excess. moisture causes rot.
- Jade plants are often grown indoors with a saucer or container under the pot. to prevent water from spilling into the house after watering. If the saucer or tray is not emptied regularly, water can seep under the pot and keep the soil soggy, causing the leaves to rot and blacken.
- Sometimes jade plants are grown in rather ordinary plastic pots and then placed in them. decorative pots for the home. Water can collect at the bottom of outdoor pots (which often lack drainage holes) and cause rot.
Potted ornamentals can prevent water from running off the roots.Jade plants need dry soil. Therefore, to avoid conditions that blacken the leaves and stems, it is very important to plant them on a stake with drainage holes at the base and to ensure that excess water can escape freely. from the base after irrigation.
As with jade plants that suffer from overwatering or slow soil drainage. pruning the black parts of the plant to leave healthy growth may be the only way the jade plant will survive. Of course, you can easily propagate Jade from leaves and cuttings to save your plant.
high humidity May contribute to leaf blackening.
Jade plants are native arid environments in South Africa with windy conditions on mountain slopestherefore, they are accustomed to low humidity.
If the humidity in your climate or home is high, the leaves may turn black.
Higher humidity decreases the rate of transpiration (water loss) from your Jade plant’s leaves, which causes water stress and can turn your plant black.
There are a few factors that can lead to higher humidity levels for jade plants in a home:
- water. As mentioned earlier in this article, but worth re-emphasizing, always water jade plants low rather than high. Water on the leaves reduces transpiration and creates a humid microclimate.
- Jade plants in damp rooms of the house.. Rooms, such as bathrooms or kitchens, can generate a lot of steam when showering or cooking, which can increase humidity levels.
- naturally humid climates (such as Florida) can make Jade plants more at risk of blackening by increasing the amount of full sun and placing Jade in a windy location.
To reduce humidity, place your Jade plant in full sun and ideally within a breeze of an open window to avoid stagnant air. Also, do not put your Jade in a damp room.
High humidity is often not the only cause of jade plant blackening, but it is often a major contributing factor, so with good watering practices, well-drained soil, well-drained pots, and less humidity, the jade plant can grow healthily.
(Read my article, how to save a jade plant that is losing leaves).
Key learning points:
- The leaves and stems of jade plants turn black from excess moisture around the roots, which leads to rot. If the jade plant has black spots on the leaves, this is due to excessive watering and slow soil drainage.
- Overwatering and slow soil drainage are the most common reasons why jade plants turn black. Pots without drainage holes are also a cause of root rot and high humidity.
- Try to mimic the growing conditions of the jade plant’s native South Africa with full sun, little water, a windy location and well-drained sandy soil to prevent the jade from turning black.
- Jade plants can be saved by cutting off the black leaves and stems to prevent rot from spreading. If there is a lot of rot, use the healthy leaves or cuttings for propagation.