Advanced Nutrients Rhino Skin - Potassium Silicate for Stronger Stems
Best for: growers who want tougher stems, stronger cell walls and more resilient plants under heavy bud weight or environmental stress.
Our thoughts
Silica additives are one of those things that don't get talked about as much as PK boosters, but a plant with genuinely stronger cell walls handles heat, pests and heavy bud weight noticeably better. Rhino Skin is a straightforward potassium silicate supplement rather than anything complicated, and it's easy to fold into an existing feed.
Rhino Skin is a potassium silicate additive, formulated to be easy to mix into water and readily absorbed by the plant. Silica isn't classed as an essential nutrient in the same way as nitrogen or potassium, but it plays a real structural role - it strengthens cell walls in stems and leaves, which supports stronger stalks, better resistance to pests and pathogens, and more support for heavy flowers later in bloom.
It's dosed at 2ml per litre and typically used from around week 1 through to week 6 of the flowering phase, though many growers also run it earlier through the vegetative stage for the same structural benefit.
How it compares
Silica supplements are a well-established category with a handful of established names.
- Compared with GHE Armor Si, a similarly positioned potassium silicate additive, Rhino Skin covers the same core role of strengthening cell walls.
- Compared with Botanicare Silica Blast, another established silica supplement, the dosing philosophy is broadly comparable - a small daily addition rather than a big one-off dose.
- Compared with skipping a silica additive altogether, adding one is a low-cost way to reduce stem snapping and improve stress tolerance, particularly for heavy-yielding strains.
It's not going to replace your PK booster or base feed, but as a structural support additive it does a genuinely useful, if less glamorous, job.
Usage guidance
Simple to dose alongside an existing feed.
Dosing
Add at 2ml per litre, typically from week 1 through to week 6 of flowering.
Mixing order
Add silica to plain water first and mix thoroughly before adding other nutrients, since silica can interact with some nutrient concentrates if added directly together.
Best use case
Particularly useful for strains that produce heavy, dense flowers prone to stem stress, or in grow spaces with heat or humidity swings.
Technical specifications
- Active ingredient: potassium silicate
- Format: liquid concentrate
- Dosage: 2ml per litre
- Use period: weeks 1-6 of the flowering phase (commonly also used in veg)
- Sizes available: 1L and 4L
- Compatible media: hydroponics, coco coir, soil
- Brand: Advanced Nutrients
Who this is for
- Growers of heavy-yielding strains prone to stem or branch stress under bud weight
- Anyone dealing with pest or pathogen pressure who wants an extra layer of structural resistance
- Growers in grow spaces with heat or humidity fluctuations that put extra stress on plant tissue
Our take
Rhino Skin isn't a headline additive, but stronger stems and cell walls genuinely matter once the plant is carrying real bud weight. It's cheap to dose and easy to add to almost any existing schedule.
Worth picking up if you want straightforward feeding without the hassle - a sensible low-cost addition rather than a big decision.
