Root Stimulators

A root stimulator gets new roots growing fast after cutting, sowing or transplanting, so young plants settle in and start feeding sooner. Pick a liquid booster for hydro and coco, a microbial inoculant to build the root zone, or a rooting gel or dip for fresh cuttings.

22 products

Root Stimulators

Root Boosters, Root Enhancers and Rooting Compounds

A root stimulator helps cuttings, seedlings and fresh transplants put out new roots fast, so they start feeding sooner. This collection covers liquid boosters like General Hydroponics RapidStart, Botanicare Rhizo Blast and BioBizz Root-Juice. Microbial inoculants and rooting compounds for clones round it out....

Root booster infographic: liquid boosters, microbial inoculants and rooting compounds, label rates and when to use each

For more gels and dips, see our cloning gels and solutions. Microbe-only products have their own mycorrhizae and bacteria page, and both sit in the wider nutrients range.

Types of Root Boosters

Liquid Root Boosters

RapidStart is a 1-0.5-1 built on plant extracts and amino acids. Rhizo Blast blends Ascophyllum nodosum kelp with Chlorella. Root-Juice uses humic acid and seaweed and carries organic certification. For recirculating hydro, pick RapidStart or Rhizo Blast. For soil, coco and peat, House and Garden Roots Excelurator Gold is made for those media.

Microbial Inoculants

Emerald Harvest Root Wizard carries six PGPR strains and needs two applications per cycle. Each Voodoo Juice Plus tablet holds 10 billion CFU of 16 bacteria and fungi strains. BioSafe TerraGrow is OMRI listed, and Elite 91 Myco Jordan supplies 500 spores per gram of Glomus intraradices.

Rooting Compounds for Cuttings

Athena Cuts is a water-based rooting gel in a squeeze bottle that seals the fresh cut. Elite 91 Clones is a liquid with two rooting hormones, used straight from the bottle as a 5-second dip.

How Growers Use Root Boosters

Start at the cutting or transplant and run through early veg, the window most labels set. Mix the booster into the water first, then add base nutrients and check pH. Heavy 16 Roots goes in first at 1 mL per gallon and also keeps drip lines clean.

Frequently Asked Questions

What does a root stimulator do?

It speeds up new root growth so young plants take up water and feed sooner. Most are light on nutrition and rely on extracts, humic acid or microbes instead. RapidStart, for example, is only 1-0.5-1, with plant extracts and amino acids pushing root branching and fine root hairs.

Root stimulator vs rooting hormone: what is the difference?

A rooting hormone goes straight onto a fresh cut stem before it goes into media, like Athena Cuts gel or the Elite 91 Clones dip. A booster mixes into the water and feeds the whole root zone, as Rhizo Blast does at 2 mL per gallon. Many growers use both.

Can you use root stimulator on established plants?

Yes, within each label's window. Botanicare runs Rhizo Blast through week three of flower, and Heavy 16 Roots is labeled through the final week. BioBizz says Root-Juice also suits plants that have already rooted and need to push further. Follow the label for timing and rate.

How often should you use a root booster?

It depends on the product. Rhizo Blast goes in at 2 mL per gallon with every watering, and RapidStart at 1 tsp per 5 gallons. Root Wizard needs only two applications per cycle. One Voodoo Juice Plus tablet treats up to 100 gallons. Always follow the label.