Biochar + compost 1Kg

Terralba presents a way to activate your soil sustainably by using biochar + compost (micro-organism), an organic product that can be used as a mixture during substrate preparation by spreading it or combined with the compost tea kit 11L, now availab [...]

  • 9.90€ 8.90€

Terralba Hydrolyzed Kelp

For all growers interested in organic farming, Alchimia invites you to discover Terralba Kelp Hydrolysate, now available online in our nutrient catalogue. Ideal for promoting vigorous root development, Kelp Hydrolyzate also offers better nutrient up [...]

  • 50gr9.90€ 8.90€
  • 100g14.90€ 13.40€
  • 250g19.90€ 17.90€
  • 500g34.90€ 31.40€


SuperMix from Plagron is a mixture of organic fertilisers designed to enrich all types of soil in an efficient and durable way.It promotes an explosive growth and flowering thanks to its very complete and balanced composition. Marijuana plants enjoys [...]

  • 1L17.61€ 13.20€
  • 5L36.80€ 27.60€


Alchimia presents Superguano by Top Crop, a natural fertiliser perfect for enriching our cultivation soil and obtaining outstanding results. Superguano is collected in caves away from human activity. It is composed of bat guano free of pollutants an [...]

  • 1kg8.50€ 5.95€
  • 5kg35.00€ 24.50€

Guanodiff Bloom

Guanodiff Bloom flowering fertiliser has been developed by Guano Diffusion from bat guano and beet molasses vinasse, for a generous harvest of flowers heavy with resin and terpenes. Now available online in the organic fertiliser catalogue here at Alc [...]

  • 500g8.90€ 7.55€
  • 1Kg13.90€ 11.80€


This kit of solid organic nutrients by Terralba has been designed to be mixed with 50L soil, enough for a few cannabis plants or to improve the soil of your orchard. It includes several organic soil improvers chosen to give our plants all the necess [...]

  • 49.90€ 39.90€


Terralba's 100L Pack contains solid organic nutrients and is created to be mixed with 100L soil, enough for some marijuana plants or to improve the substrate of your orchard. This pack includes different organic soil improvers so your plants have al [...]

  • 79.90€ 63.90€

Plagron Promix 50L

Plagron Promix 50L is now available in Alchimiaweb, a substrate for marijuana plants made from different quality peat moss that provide excellent oxygenation and lightness. This soil only contains worm castings, without any other nutrient , helping [...]

  • 14.70€ 12.45€

Mealworm Guano

Alchimiaweb adds this exceptional product manufactured by Terralba to its catalogue: Ténébrion Meunier castings, also know as mealworm. This natural product is rich in nutrients and organic matter (76%). It contains 22% nitrogen, 35% phosphorous, [...]

  • 250g10.90€ 8.70€
  • 500g (Out of stock)16.90€ 13.50€

Biotabs Silicium Flash

Silicium Flash from BioTabs is a 100% organic fertiliser formulated for use with fast-growing plants and composed of rapid-absorption silicon. Rich in nutrients and trace elements, Silicium Flash also contains calcium and magnesium and can help to av [...]

  • 2500 ml29.00€ 23.20€

SimbioSoil Plus

SimbioSoil Plus is a soil amendment rich in microbial life and bacteria, incorporated in a composted olive pulp base, perfect to revive the most depleted soils, and making it really easy to recycle and re-use the soil from our cannabis grow. Now avai [...]

  • 1 Kg9.50€ 8.55€

Dolomite THC

Now available in Alchimiaweb, THC's Dolomite is a mineral product rich in Calcium and Magnesium designed to supplement your substrate , as well as to stabilize its pH. This powder mineral has slow-absorption components so that plants can take the ne [...]

  • 5.00€ 3.50€

Top Coco

Alchimia presents Top Coco coconut fibre by Top Crop, a substrate that provides strong, healthy and vigorous root development for your plants. It is now available in our cultivation substrates catalogue, perfect for growing healthy plants. Top Crop [...]

  • 50 L15.50€ 11.60€

Guanodiff Classic's Powder

Guanodiff Classic's Powder is a bat guano fertiliser developed by Guano Diffusion and specially adapted to provide all the nutrients needed for the growth phase of our cannabis plants, now available online at Alchimia! 100% organic, this natural fer [...]

  • 500g7.90€ 6.70€
  • 1 Kg9.90€ 8.40€
  • 3 Kg25.00€ 21.25€

Hydrolyzed Fish Meal

Fish has been used as nutrient for plants for a long time. Native Americans had already observed that they could double the yield of a corn plant by burying a fish near its roots. Fish meal (powder) is now available in Alchimia's catalogue. This top [...]

  • 100g6.90€ 5.50€
  • 250g10.90€
  • 500gr19.50€ 15.60€

Biobizz Worm-Humus 40 L

What is Worm-Humus? Worm-Humus, also known as vermicast, is a highly beneficial product for growing cannabis. It is the result of the decomposition of the material excreted by earthworms, which are sublime inhabitants of the soil. This high-quality [...]

  • 17.95€

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