The first step in saving your overwatered plants is to determine how badly they have been affected. If your plants are showing some yellowing but have not yet started to wilt, you can save them by beginning to water them properly. If wilting has started to occur, you will need to work harder in order to save them.
Stunted slow growth accompanied by yellowing leaves is also a symptom. Leaves falling off often accompanies this symptom. If your plants have yellowing leaves and old leaves, as well as new leaves that are falling at the same accelerated rate, you are overwatering.
Increases in the rate of leaves senescence and drooping, scorching and limp leaves, leaf rolling and brittleness, closed flowers and flower sagging, etiolation, wilting, turgidity, premature fall, senescence and yellowing of leaves are among the most ubiquitous symptoms of drought stress in plants [65,66].
The good news is that most plants will bounce back between 7-14 days if they're given proper care (which includes rehydration). If this isn't possible because major damage was done or little healthy root system exists then expect about 2 weeks until improvement can be seen.
To dry out soil quickly, you can apply hydrated lime to the soil, add compost and then turn the soil thoroughly to aerate it.
Signs of root rot are slow growth, mushy stems, and wilting, yellow, distorted leaves (especially when the plant has been well watered, as wilting leaves can also be a sign of a dry plant).
– Manually Dry Out
Otherwise, manually dry out the soil by using a hair blow dryer, but of course, you will have to remove the plant from the pot so that every section of the root and the soil is dried out.
Look out for signs of overwatering – including a limp plant, yellowing leaves, or dropping leaves. If you see these signs, test the soil with your fingers. It should be pretty obvious if it's soggy! Stop watering and let the soil dry out.
If your plant has been overwatered due to the lack of drainage holes, you should repot your plant as soon as possible.
Underwatering your plants will result in limp and wilting leaves. Your plants must have enough water to pass through the cells for turgor. If there isn't enough water, the plant will not only wilt but also close its stoma to prevent evaporation.
In the most extreme cases, when conditions are ideal for the fungus to spread quickly, plants can die within 10 days. If these symptoms occur in a plant, loosen the soil around the base of the plant with a hand trowel or shovel and remove the plant from the soil.
Add Organic Material
Aside from adding fertility, organic material is also great for breaking up heavy dense soils. By mixing and bonding with soil particles it allows for more air space and drainage. As a side note adding organic material can also help dry soils hold moisture.
“I would say overwatering is one of the biggest reasons for houseplant deaths. People tend to 'overcare' for their plants and over water. Overwatering can 'drown' your plants and lead to root rot. I would definitely under water than risk overwatering a plant.”
If the soil is wet, it's overwatered - if it's dry, it's underwatered. Browning edges: Another symptom that can go both ways. Determine which by feeling the leaf showing browning: if it feels crispy and light, it is underwatered. If it feels soft and limp, it is overwatered.
Is Overwatering Worse Than Underwatering? Overwatering is much worse for plants and has a much greater chance of resulting in the plant dying. Overwatering causes much more extensive root damage, which often must be treated by pruning off the affected roots and repotting the plant.
Poor drainage or improper watering
Water issues — either too much or too little — are the leading reason behind yellow leaves. In overly wet soil, roots can't breathe. They suffocate, shut down and stop delivering the water and nutrients plants need. Underwatering, or drought, has a similar effect.
A yellow leaf has lost its chlorophyll (pigment) and it can't turn green again even after you correct the problem. Don't worry, if the plant regains its health, it's possible that new leaves will fill in during the next growing season. Growing plants is always a matter of patience.
Place the container in the water and let it sit for about 15 minutes so that the soil can soak up all the moisture it needs. Larger containers need to sit for a bit longer, and smaller containers for bit less time. Keep an eye on things. If the soil soaks up all of it during those 15 minutes, add more.
No plant wants to be stuck into bone-dry earth.
That's because plant roots need moisture. Not only do they need water to run their physical systems, but moist soil also enables them to root into the ground well.