Cannabis Plant Problems & Diseases

Mildew on Cannabis: Identify & Prevent

Cannabis is naturally dioecious. This means that male and female flowers normally grow on separate plants. Nevertheless, sex expression can be influenced by genetic factors, plant hormones, developmental stage, and various environmental conditions. Under certain circumstances, male flowers can therefore also develop on a predominantly female plant.

Hermaphrodite Cannabis: Identify & Prevent

White spots on the leaves are warning signs that should never be ignored when growing plants from the right cannabis seeds. What initially looks like a harmless coating is often mildew, a plant disease that can spread to large parts of a plant or even an entire crop within only a few days when conditions are favourable. One particular problem is that the pathogen may already be developing before obvious damage becomes visible.

HPLVD in cannabis: recognising symptoms, preventing transmission

HPLVD has now become one of the very important problems in cannabis cultivation and should definitely not be underestimated. Many other problems in a grow can be recognized easily and quickly: for example an incorrect pH value, too much fertilizer, air humidity that is too dry, a pest infestation, or diseases. HPLVD is different and insidious. A plant can look stable on the outside, produce cuttings, and still carry an infectious viroid inside.

Spider mites on plants – successfully combating an infestation

Spider mites are a major problem when growing plants – they are barely larger than a speck of dust, tend to settle on the underside of leaves, and damage the plant not by making holes in the leaves but by sucking the sap from individual plant cells. At first, the leaves appear only slightly speckled; later, they lose their colour, vitality and ability to photosynthesise. The later you spot them, the harder it becomes to get rid of them.

Cannabis Wind Burn: Identify, Treat and Prevent

Wind is normally always a good thing when growing. A light breeze moves the leaves, strengthens the stems, distributes fresh air, prevents stagnant air, and helps transport moisture out of the canopy. Without air movement, the grow room quickly becomes musty, humid, and naturally more susceptible to mold.

Mould in Cannabis: causes, risks and prevention

Mold on cannabis is a frustrating but very important topic that many growers unfortunately only think about when it is already too late. A flower may still look good from the outside, perhaps smell a little musty, and when it is broken open, a gray, brown, or whitish coating suddenly appears – and the most important question immediately arises: Is the rest of the plant still usable, or does everything have to go?

Outdoor Cannabis Pests: How to Protect Your Plants

Anyone who grows cannabis outdoors usually realizes pretty quickly that it’s not just sun, rain, and temperature that play a role. Eventually, almost without fail, something else shows up: pests. Sometimes it's small bite marks on young leaves, sometimes something is suddenly sticking to the shoots, and sometimes the plant simply doesn't look as vital as it did a few days prior. That is exactly where the real problem begins. Not every grow fails because of major mistakes. Often, it's the little things that are noticed too late...

Identify Nutrient Deficiencies

Growing cannabis can be incredibly rewarding, especially when plants grow healthy, strong and full of life. But sometimes leaves suddenly change color, growth slows down or plants begin to look weak, even when everything seems to be done correctly.

This guide focuses on identifying nutrient deficiencies in cannabis plants early. Yellow leaves, brown spots, discoloration or curled leaf tips can all be signs of missing nutrients or growing problems. The article explains the most common symptoms, possible causes and practical solutions for maintaining healthy cannabis plants.