Also known as: Recharge · Real Growers Recharge · RGR

Recharge by Real Growers

A popular soil microbe and amendment blend marketed as a top-dress probiotic for cannabis and vegetable gardens.

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Recharge is a convenient, shelf-stable blend of mycorrhizae, Trichoderma, Bacillus species and food sources like kelp and molasses. It works fine as a soil drench, and growers genuinely like it. But the marketing — 'compatible with anything,' near-magical recovery from overfeeding, dramatic yield bumps — is way ahead of any controlled evidence. Treat it as a reasonable microbe top-up for living soil and recovering pots, not a fix for bad watering, bad genetics, or bad nutrients. Cheaper homemade alternatives exist if you compost.

What it is

Recharge is a powdered soil amendment sold by Real Growers. According to the manufacturer's label, it contains mycorrhizal fungi (endo species), Trichoderma species, several Bacillus species (including B. subtilis, B. licheniformis, B. megaterium, B. amyloliquefaciens), plus food sources for those microbes: kelp meal, fish meal, molasses, glacial rock dust, and humic/fulvic acids [1].

Functionally it sits in two product categories at once:

The individual ingredients are well-studied in agriculture. Mycorrhizal symbiosis with plant roots is one of the most established relationships in plant biology [2]. Trichoderma and Bacillus spp. are widely documented as plant-growth-promoting and as biocontrol agents against root pathogens [3][4]. What is not well-studied is this specific commercial blend in cannabis.

Why growers use it

Common reasons people reach for Recharge:

Claims of large yield increases are not backed by controlled cannabis trials No data. Independent studies on mycorrhizae in cannabis have shown mixed results, with some finding no significant biomass or cannabinoid benefit under typical high-fertility cultivation [5].

When to start (and stop)

Start early. Mycorrhizal colonization works best when hyphae meet young, actively growing roots before the rhizosphere is dominated by other organisms [2]. Practical entry points:

Don't bother applying to bone-dry, hot, or fully anaerobic soil — the microbes need moisture and oxygen to do anything.

How to use it, step by step

The label rate is 1 teaspoon per gallon of water as a routine drench, or up to 1 tablespoon per gallon for stressed plants [1]. A simple, conservative protocol:

  1. De-chlorinate your water. Chlorine and chloramine in municipal tap water can kill some of the added bacteria. Use rainwater, RO, well water, or let tap sit 24h (chlorine only — chloramine doesn't gas off; use a carbon filter or ascorbic acid).
  2. Warm the water to roughly room temperature (18–24 °C / 65–75 °F). Cold water shocks roots and slows microbial activity.
  3. Measure 1 tsp per gallon. Don't eyeball it — the powder is potent and overdosing wastes money without obvious benefit.
  4. Stir to dissolve. It will look like dirty water with bits floating. That's normal.
  5. Apply within ~30–60 minutes. Once rehydrated, microbes start metabolizing. Don't store mixed solution.
  6. Water in normally. Apply to moist (not bone-dry) soil so the drench actually penetrates rather than channeling down the sides.
  7. Repeat every 1–2 weeks. More often isn't shown to help.

In hydro or recirculating systems, Recharge is generally not recommended — the organic food sources can foul reservoirs and feed biofilm. Stick to root drench applications in soil, coco, or peat mixes.

Common mistakes

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Jun 1, 2026
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Jun 1, 2026
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