Why is algae a superfood for cannabis?
Algae, especially seaweed extract, have long been considered a secret weapon in organic farming. But why are they also so valuable for cannabis plants?

Nutrient-rich power source
Algae contain over 60 trace elements, amino acids and vitamins (e.g. B1, B12, cytokinins), which stimulate root growth and increase chlorophyll production.
Natural growth booster
The plant hormones contained in algae (auxins, gibberellins) promote cell division and accelerate vegetative growth – ideal for the growth phase!
Strengthening the immune system
Algae increase resistance to stress factors such as heat, drought or pests, which leads to more robust plants.
Scientific basis – What does research say?
Studies show that algae extracts:
- Improve nutrient uptake by up to 30%(source: Journal of Applied Phycology).
- Activate the microorganisms in the soil, which promotes root health.
Critical consideration:
Some growers argue that synthetic fertilizers work faster. However, algae develop their full effect more sustainably and without the risk of over-fertilization.
Practical application in cannabis cultivation
As a foliar spray
Dilute liquid seaweed extract (1:500) and spray on the leaves every 2 weeks during the growth phase.
As a soil additive
Dry algae granules can be mixed into the soil and release nutrients slowly.
Combination with other fertilizers
Algae harmonize well with guano or mycorrhizal fungi – a synergy effect for healthy plants!
Alternatives & criticism
- Costs: High-quality algae products are more expensive than chemical fertilizers.
- Odor: Organic algae preparations can smell unpleasant (observe ventilation!).