Atami Rootbastic - High-NPK Root Stimulator for Early Root Development
Best for: growers who want to give young cuttings and seedlings the strongest possible start on root development, using a concentrated product for the first few weeks only.
Our thoughts
Rootbastic is the premium root-side partner to Atami's Bloombastic - both sit in the Bastics range and both are concentrated, short-window products rather than something you dose all season. If you've used B'Cuzz Root Stimulator before, this is the step-up version: a higher NPK content and a more precise, staged dosage for the first few weeks of rooting.
Rootbastic is a concentrated root stimulant from Atami's Bastics range, formulated with a notably high NPK content aimed specifically at building larger, healthier root systems early on. It's designed to be introduced once roots are just starting to form - Atami's own guidance is to begin once roots on a cutting reach around 2 inches long, or a few days after seed germination - and used for roughly the first three weeks of the rooting stage.
It works across all growing mediums and systems (soil, coco and hydro), and the dosage steps up gradually rather than staying flat, which keeps young, sensitive roots from being overfed while still giving them a strong early push.
How it compares
Rootbastic competes at the premium end of the root-stimulant category, alongside other concentrated early-root boosters.
- Comparable in role to House & Garden Roots Excelurator and Canna Rhizotonic, both widely used early-root stimulants.
- Higher NPK content than Atami's own B'Cuzz Root Stimulator, which is the brand's mainline, lower-concentration root additive used over a longer window.
- Similar staged-dosage approach to General Hydroponics RapidStart, ramping the dose up gradually across the first couple of weeks rather than applying a flat rate.
If you want a longer-running, lower-cost root additive for general use, B'Cuzz Root Stimulator is the better fit; Rootbastic is for growers who want a concentrated, short, higher-strength push specifically at the rooting stage.
Usage guidance
Rootbastic is used early and for a limited window, not throughout the whole grow.
When to start
Begin once cutting roots are approximately 2 inches long, or a few days after seed germination.
Dosage schedule
Use 0.1ml per litre of water in week 1, increasing to 0.2ml per litre in week 2, then continuing at the higher end (up to around 0.3ml/L) into week 3.
Duration
Limit use to roughly the first three weeks of the rooting stage - it's not designed as a season-long additive.
Compatibility
Suitable for use in soil, coco and hydro systems alongside your normal base nutrient.
Technical specifications
- Format: Concentrated liquid root stimulator
- NPK content: High relative to Atami's mainline root products
- Dosage: 0.1ml/L (week 1) rising to 0.2-0.3ml/L (weeks 2-3)
- Usage window: First ~3 weeks of rooting, from roots reaching ~2 inches or a few days post-germination
- Growing media: Soil, coco and hydro
- Range: Atami Bastics (premium line)
- Companion product: Atami Bloombastic (bloom-phase equivalent in the same range)
Who this is for
- Growers taking cuttings who want maximum root development before moving to a larger container.
- Anyone germinating seed who wants a strong, controlled early root push.
- Growers already using B'Cuzz Root Stimulator who want a more concentrated option for propagation specifically.
Best suited to the propagation and early rooting stage rather than ongoing use through the whole grow.
Our take
It's a focused product that does one job well - get roots away strongly in the first few weeks - rather than trying to be an all-season additive. The staged dosage takes the guesswork out of not overdoing it on young roots.
If propagation is where you tend to lose plants or end up with a weak root base, this is worth building into your routine. Particularly well suited to new growers who want a clear, staged schedule to follow.
