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Cultivation Matters

Are You Watering Your Cannabis Plants Too Much? Too Little?
Finding the ‘just right’ Goldilocks zone of substrate moisture can mean the difference between a record-breaking harvest and a catastrophic crop failure.
Pythium, often observed as plant wilt, is common if plants are consistently overwatered and in a saturated root zone.
The Dangers of Calcium Deficiency in Cannabis Crops
When environmental conditions reduce transpiration, Ca delivery to young tissues can be restricted, even when sufficient Ca fertility is available, leading to structural (and financial) instability.
Feel The Burn2 Cm
Stop Cannabis Nutrient Problems Before They Cause Long-Term Damage
How to build an in-house nutrient monitoring system to help your team prevent small problems from turning into large economic losses.
Figure 1. Establishing a common in-house monitoring kit that can be accurately utilized by all users and can replicate values routinely.
Testing Your Cannabis Substrate Is 1st Step to Success
Preplant substrate sampling can help cannabis growers proactively identify and correct potential issues rather than react to problems after they arise.
Cultivation Matters Cannabis Substrate
Steel Your Cannabis Crops Against Iron Deficiency
Iron deficiencies in cannabis crops can be caused by many triggers.
Iron deficiency observed as interveinal chlorosis of the upper foliage as a result of high substrate pH.
Feel the (Cannabis Leaf Margin) Burn
Leaf margin burn can mean a variety of things when presenting in cannabis plants. Here’s what you need to know.
Calcium deficiency symptoms on upper foliage include marginal burn and distorted leaf growth due to impaired cell wall development.
The Right Spot: Understanding Nutrient Mobility in Cannabis Plants
When identifying nutrient deficiencies, remember: location, location, location.
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Balancing Root Zone pH in Cannabis Cultivation
Understanding how water quality, substrates and fertilizers impact substrate pH is crucial to crop health.
Cultivation Matters Top Story Image March 2025
3 Questions to Ask When Diagnosing Cannabis Plant Health Issues
Knowing the pattern, distribution, and timeline of a problem can guide you to the proper solution.
Cultivation Matters Jan 2025 Top Story Image
When Less Is More: The Harms of Overfertilizing Your Cannabis Plants
Research shows that plants absorb excess nutrients even when they're not needed (called ‘luxury consumption’), which can even inhibit uptake of other nutrients. Learn how to meet plants’ needs while avoiding problems and saving money in the process.
Luxury uptake can result in nutrient antagonism. For example, high phosphorus can result in iron deficiency (A), and high calcium can result in magnesium deficiency (B) even when adequate fertility is available.
Teasing Out Mimics: Potassium vs. Magnesium
An NCSU study on optimal potassium and magnesium fertility for Cannabis sativa explored how various rates impact growth in the vegetative and flowering stages and the unique indicators of both nutrients to help with diagnostics.
LEFT: This six-week-old Cannabis sativa ‘BaOx’ plant received 0.0 ppm K fertility. RIGHT: Magnesium deficiency symptoms in their early stages.
Cultivating Cannabis With Pre-Charged Substrates: What You Need to Know
How to adjust production protocols when using pre-charged substrates to ensure plants are getting optimal nutrients.
Figure 1. Excessive substrate electrical conductivity levels can result in girdling of the young transplant.
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