Irrigation Basics – What You Need to Know
How much water do cannabis plants need?
Cannabis plants require different amounts of water depending on their growth stage. While seedlings and young plants require careful watering, the need increases significantly during the flowering phase. As a general rule of thumb:
Growth phase: Slightly moist soil, but not wet.
Flowering phase: Even moisture, but with dry periods between watering.
The right time to water
Many people ask themselves: Should I water in the morning or evening? The answer depends on the environment:
Outdoor cultivation: Water in the morning to minimize evaporation.
Indoor cultivation: With artificial light, you can also water in the evening as long as the air circulation is good.
Common watering mistakes and how to avoid them
Overwatering – the most common mistake
Too much water suffocates the roots and leads to oxygen deprivation. Signs:
Limp, yellow leaves
Slow growth
Mold formation
Solution: Perform the finger test – is the top layer of soil (2-3 cm) dry? Only then should you water!
Under-irrigation – underestimated danger
Dry soil damages the roots and inhibits nutrient uptake. You can recognize it by:
Crispy, brown leaf edges
Curled leaves
Tip: If necessary, use a moisture meter for precise control.
Advanced techniques for optimal results
Improve drainage – why it is important
Waterlogging is fatal for cannabis. Take care of:
Loose, permeable soil (e.g. with perlite)
Pots with drainage holes
A layer of expanded clay at the bottom of the pot
Automatic irrigation systems
For larger grow projects, drip irrigation systems are worthwhile. Advantages:
Even water distribution
Time savings
Conclusion – Water is life, but moderation is key
Proper watering isn’t rocket science, but it does require attention. Observe your plants, adjust the amount, and avoid extremes. With these tips, nothing will stand in the way of a bountiful harvest!