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Cannabis Grow Guide

Artikelen

  • Compact cannabis inflorescence on the left and elongated foxtailing inflorescence on the right, cropped from Gabriel et al. (2025).

    Foxtailing in Cannabis: Genetics, Environment, or Both?

    · Maarten Casteleijn

    Foxtailing is a grower term for Cannabis flowers that develop elongated, tower-like extensions instead of remaining uniformly compact. New floral tissue continues to form above...

  • Close-up of dark green cannabis leaves with downward-curled tips and edges above a potting mix containing perlite.

    Can You Overfeed Cannabis Without Nutrient Burn?

    · Maarten Casteleijn

    Cannabis growers often use burnt leaf tips as the first warning that fertilizer levels are too high. If the tips remain healthy, the assumption is...

  • Gloved hands holding a young cannabis plant with its intact root ball and visible white roots above a larger pot outdoors.

    Transplant Shock in Cannabis: What Happens After Repotting?

    · Maarten Casteleijn

    Repotting Cannabis looks simple above ground. The plant is removed from one container, placed in a larger one and continues growing. Below ground, however, the...

  • Large cannabis plants growing outdoors in rows of wide fabric containers, with irrigation hoses running along the ground.

    Root Volume and Pot Size: How Much Space Does Cannabis Actually Need?

    · Maarten Casteleijn

    Choosing a pot for Cannabis is often reduced to a simple rule: bigger plant, bigger pot. Container volume influences how much space roots can explore,...

  • Removed cannabis branches and leaves beside scissors and a potted plant with an exposed lower stem, under purple grow lighting.

    Lollipopping and Pruning: What Happens Below Ground?

    · Maarten Casteleijn

    Cannabis growers usually judge pruning by what happens above the substrate. Topping produces more side branches, lollipopping removes shaded lower growth, and both techniques can...

  • Worker on a pipe-rail trolley between tall tomato rows in a commercial greenhouse, with exposed lower stems, substrate slabs and drip irrigation lines.

    Defoliation: Does Removing Cannabis Leaves Actually Increase Yield?

    · Maarten Casteleijn

    Growers take very different approaches to removing cannabis leaves. Some remove only a few large fan leaves that block light. Others strip a substantial part...

  • Young cannabis plant with green serrated leaves growing in substrate in a round orange-brown pot, viewed from above.

    Living Soil vs Coco vs Rockwool: Which Is Best for Cannabis?

    · Maarten Casteleijn

    Header photo: Plantlady223, Wikimedia Commons, CC BY-SA 4.0.Ask cannabis growers about the best growing medium and you quickly enter three different worlds. One grower wants...

  • Organic or Mineral Nutrition: Which Is Better — or Is the Best Answer Both?

    Organic or Mineral Nutrition: Which Is Better — or Is the Best Answer Both?

    · Maarten Casteleijn

    Ask growers whether organic or mineral nutrition is better and you can start a surprisingly passionate discussion.Mineral growers often value control, fast availability and predictable...

  • Compressed brown coco coir brick with visible coconut fibres. Photo: MatiasMiika, CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/). Source: https://commons.wikimedia.org/wiki/File:Brick_of_coco_coir.JPG

    Coco Is Not Soil: Why Cannabis Roots Behave Differently in Coir

    · Maarten Casteleijn

    Coco coir is one of the most popular growing media for indoor Cannabis, but it is often treated as if it were simply a lighter...

  • Cannabis plant with leafy shoots and dense flowering branches in a container beneath LED grow lights, with irrigation tubing visible at the base.

    Does Stress Increase THC or Terpenes?

    · Maarten Casteleijn

    Stress can change Cannabis chemistry, but higher percentages do not necessarily mean greater production. Explore the distinction between crop steering, damaging stress and productive plant...

  • Dark-field microscope image of cannabis glandular trichomes with rounded blue-green heads on translucent stalks. Cropped from Figure 1B, Tanney et al. (2021), CC BY 4.0.

    Cannabinoids: Why Does the Plant Make Them?

    · Maarten Casteleijn

    Cannabis does not make cannabinoids for humans. Explore their role in plant defence, how trichomes manufacture them, and why higher concentration is not the same...

  • Close-up of a flowering cannabis plant with white pistils and trichome-covered green leaves.

    Terpenes: Why Does the Plant Make Them?

    · Maarten Casteleijn

    Cannabis terpenes are more than aroma. Explore why plants invest in these specialised compounds, from defence and communication to stress responses and ecological interactions.