Underwatered Weed Plants

By: Maria

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Imagine this: You’ve spent weeks nurturing your cannabis plants, ensuring they have the right nutrients, light, and temperature. But despite your best efforts, you notice your plants wilting, their growth stunted, and their leaves discolored. You’re left scratching your head, wondering what went wrong. The culprit? Underwatering. In this article, we’ll delve into the world of underwatered weed plants, their causes, signs, treatment, and how to water them properly.

What are Underwatered Weed Plants?

Underwatered weed plants are cannabis plants that haven’t received adequate water for their biological processes. Water plays a crucial role in plant physiology, including photosynthesis and transpiration, which are vital for the plant’s growth and health. When a cannabis plant is underwatered, it can’t perform these essential functions, leading to a range of problems, including wilting, slow growth, and leaf discoloration.

Causes of Underwatering

Underwatering can occur due to several reasons. One common cause is infrequent watering, which leaves the soil dry and unable to provide the necessary moisture for the plant’s roots. Another cause is using a pot that’s too large for a small plant. The small root system can’t uptake water before it drains away, leading to underwatering. Additionally, environmental factors like temperature and humidity can affect how often water is required, potentially leading to underwatering if not properly managed.

Signs of Underwatered Weed Plants

Identifying underwatered weed plants early can save them from irreversible damage. Here are some signs to look out for:

  1. Wilting: Underwatered plants will have limp and wilting leaves. This is due to the lack of turgor pressure, which helps maintain the plant’s structure.
  2. Dry Soil: If the soil feels dry to the touch or looks bone dry, it’s a clear sign of underwatering.
  3. Slow Growth: Underwatered plants will exhibit slow growth. This is because the lack of water hampers the biological processes necessary for growth.
  4. Discolored Leaves: The lower leaves of an underwatered plant will turn yellow and begin to curl at the edges. The edges will start to feel dry and brittle before falling off.
  5. Soil Retains Footprints: In outdoor soil, if footprints in the nearby grass do not disappear by the next morning, it indicates that the soil is dry and needs watering.

How to Treat Underwatered Weed Plants

If you’ve identified that your weed plants are underwatered, don’t panic. With the right steps, your plants can recover:

  1. Water Deeply: Ensure that you water enough to reach the roots every time you water. The larger the area, the more water you need.
  2. Water in the Morning: The roots absorb water better in the cooler environment of the morning. Avoid watering at night as the water will be unable to evaporate properly, leading to issues like mildew.
  3. Allow Time for Recovery: Underwatered plants will need time to recover, usually between three and four weeks. After this time, you should start to see the growth of new leaves and stems.

How to Water Weed Properly

Proper watering is crucial to prevent underwatering and ensure the healthy growth of your weed plants. Here are some tips:

  1. Wait Until the Plant Needs Water: Wait until the top of the growing medium is dry about a half inch deep (up to your first knuckle) before watering.
  2. Water Until You Get a Little Runoff: If using nutrients in the water, add water until you see 10-20% extra runoff water drain out the bottom of your pot.
  3. Monitor pH and PPM: The quality of the water used to supply a cannabis crop is also a highly important consideration. Monitor the pH and PPM (parts per million) of your water source to ensure optimal plant health.


Underwatering can pose a significant threat to your weed plants, but with the right knowledge and care, you can prevent and treat this issue effectively. Remember, the key to healthy weed plants is not just about providing water, but ensuring they get the right amount at the right time.

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