How to Treat Underwatered Cannabis Plants – Hon&Guan

How to Treat Underwatered Cannabis Plants

Whenever it comes to a good and abundant marijuana grow, there are several aspects to consider. Light, minerals, ventilation, and humidity all contribute to a crop's maximum development and vitality. Water, on the other hand, is an essential component in keeping marijuana plants nourished and robust. In this post, you'll learn how to diagnose, restore, and get the finest advice to help you become the perfect grower. When it comes to how much water a Cannabis plant consumes and whether it is absorbed by the roots or transpired through the leaves, there is a delicate balance to be struck. Trying to achieve the balance might lead either to overwatered or underwatered marijuana plants for a rookie grower. We'll go through how to detect underwatering as well as how to fix it in this article. There are a variety of reasons why a marijuana plant may be neglected and submerged.

It is not always possible to irrigate your plants at the same time every day.  However, based on how dry the air is, seedlings can become stressed, fatigued, and nutrient deficiency after a growth medium has become completely dry. Overwatering on a regular basis can lead to even more challenging problems than underwatering. It's a good idea to err on the side of caution and cease watering plants as much as possible.

Reasons for underwatering

How to Treat Underwatered Cannabis Plants
  • Lack of a proper watering routine in place for the cannabis plants.
  • Water is not being retained correctly by the substrate.
  • Hesitant newbie grower.
  • Very high temperatures.
  • Waterings are done infrequently.

Signs of Underwatered Weed Plants

Underwatering isn't particularly prevalent among growers, but it can happen if the soil, medium, doesn't hold water effectively or if the temperatures are too high, causing water to evaporate quickly. When marijuana plants are showing indications of underwatering, they will seem limp and nearly dying, with the fan leaves hanging downwards. The lateral roots will begin to dry up, becoming thin and brittle at the tips, and the seedlings' ability to transpire will be greatly harmed as a result. The biggest symptoms are change in leaf color and posture. They ought to be dark green and vibrant; if they begin to turn yellow, they are still dehydrated.

Before the plants begin to display symptoms, monitoring the water level of the soil is an excellent approach to make an evaluation. Monitoring the plant on a regular basis can not only help you detect an issue early on, but it will also help to prevent a lot of difficulties. Since the symptoms of underwatering, overwatering, and root rot are so similar, it's important to rule out other issues. To appropriately diagnose the problem, look for the mentioned indicators in your plant.

Marijuana plants require a wet-dry cycle to grow. The roots of the plant draw in oxygen when the earth dries up. They will suffocate if it's too moist for too long. They do, however, require sufficient water to survive. Check the soil with your finger, a few inches below, to determine whether it's dry. If it's still moist down there, the plants probably don't need to be watered just yet. Check for sagging or yellow foliage, as well as bone-dry soils deep within the container, before watering. Take notice that many of these signs are identical to those experienced when plants outgrow their containers. It's possible that the plant needs to be transplanted if it's been growing rapidly recently.

Causes of underwatering

Underwatering is caused by a lack of water being provided to the plants. Plants don't really take all of the moisture from the soil in one go. Water is absorbed by the roots from the soil medium and utilized for a variety of functions, including transpiration. In basic terms, plants lose water, which is then absorbed by the roots from the soil. If the soil is dry, the cannabis will be unable to obtain the moisture it requires for a variety of important functions. As a result, the plants becomes weakened and finally dies. The growth medium must be able to store and absorb sufficient moisture for the plants to absorb and re-absorb. This is only feasible if the plant is given enough water to grow.

It's possible that growers can forget to water irrigate the plants or will fail to follow a correct watering routine. Novice growers may not take the weather and temperatures into account while watering the plants; for example, in warm temperatures, the plants require more water. To prevent overwatering and getting too far ahead, many growers underwater their seedlings. It's fair to argue that the issues come from a lack of knowledge about suitable watering techniques. While chronic underwatering is treatable, it is preferable to avoid the problem completely by following proper watering procedures.


Feed the potted cannabis plant as soon before leaves begin to droop! While it's typically a great idea to let the potted marijuana plant dry out after watering, you must always irrigate your cannabis plants before the leaves begin to droop. This is true for marijuana plants cultivated in both soilless and soil-based growth media. Marijuana plants that have been underwatered may appear dead at first, but they quickly recover. The important thing is not just to overwater the seedlings; instead, water them till you see water drain down at the bottom of the pots. This take half a minute to a full minute for the bottoms to start generating a steady stream of water or nutrient mixture. Maintain the nutritive solutions the same as before, and don't try to play catch up by increasing the E.C concentration.

Key takeaways on how to water properly

How to Treat Underwatered Cannabis Plants

Wait till the surface of the growth media is dry, about a 1⁄2 inch deep, before watering the plant. Fungal gnats may be avoided by keeping the topsoil from being damp for lengthy periods of time. Many gardeners use the "lift the pot" technique of determining whether plants need water, which involves lifting the pot to test if it feels lighter due to a lack of moisture. Since it is more hard to overwater plants in non-soil environments, such as coco or a very high-drainage grow medium, some non-soil gardeners might irrigate a little sooner whenever the top is just about to dry up. Should you continue to have difficulties with underwatering, you may want to irrigate more frequently than is suggested. Because of the tiny pot size, rootbound plants, humidity, temperature, and other factors, you may require additional watering.

Water till there is a little amount of runoff. Add water till an amount of additional water runoff drains out the bottom of the pot if you're using fertilizers in the water. This prevents nutrient accumulation in the soil, and if you have adequate drainage, it allows plants to develop quicker than when you don't irrigate to runoff, this also makes it harder to underwater the plants. When you're not using additional fertilizers; plants that obtain all of their nutrients from the medium, such as in a super soil arrangement, simply water till you get a small bit of runoff out the bottom, ensuring the nutrients aren't washed away. You should, however, ensure that your medium is saturated.

Watch pH levels. Watering regimens that are consistent help another important component of marijuana: nutrition. The root system of the plant will acquire critical nutrients from its growth medium only if the pH levels are ideal: 6.0–7.0 for soils and 5.5–6.5 for hydro or coco. The trick is to crop irrigation on a regular basis. It not only keeps plants moisturized on a regular basis, but it also prevents pH variations, which are identified by brown patches on the lower and middle leaves. To enhance nutrient absorption, choose a method that allows for a little amount of runoff early on. This will keep pH changes to a minimal. It's especially important if you're trying to boost nutritional levels for whatever reason. If you're still having issues with your marijuana, like as malformed leaves, fungi, or spots, it's possible that the pH of the water is the issue. Overly acidic or alkaline water might throw all your calculations into shambles, regardless how competent you are at regulating the pH of soil, therefore it's a good idea to use a pH testing kit.

Wait until the plants are in need of water. Should water not drain fast or containers take longer than five days to dry after irrigating, then you might have a drainage problem or need to feed the plants lesser water at a moment until it is consuming more. When your containers dry out in only a few days, say one to two days, then there is need to feed the plants extra water at a moment or transfer them to a larger container. You'll need to repeat this process again and again to ensure your plants obtain sufficient amounts of water.


Underwatering a plant is a common occurrence that may be avoided by paying close attention and only irrigating when necessary. As the plants grow bigger and begin to blossom, the frequency of irrigating may increase. If you have a habit of forgetting to irrigate your cannabis plant, it is wise to set a timer with a reminder on your mobile or any digital device you're comfortable with. You can also buy a moisture meter for keeping track of the moisture concentration in the soil. You won't be excellent at watering straight away, but you'll grow better with practice. Give your plants some attention and watch them grow!



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