StoneSkin 0-0-5 Limestone City Nutrients

Price range: $9.99 through $259.99

StoneSkin is a potassium silicate supplement. Potassium silicate = a plant‑available form of silica plus potassium.

Silica isn’t a “nutrient” in the classic N‑P‑K sense, but plants use it to reinforce their cell walls, making their physical structure stronger and more resilient.

Think of it as giving your plant a stronger skeleton and thicker skin.

What StoneSkin Does for Your Plants

1. Builds Stronger Cell Walls

When plants absorb potassium silicate, they move silica into their cell walls. This makes the walls thicker, tougher, and more rigid.

A plant with reinforced cell walls:

  • stands straighter
  • holds heavier fruit and flowers
  • is less floppy or fragile
  • is physically harder for pests and disease to penetrate

This is why silica is often described as giving plants a natural armor.

2. Helps Plants Handle Stress

Stronger cell walls = better stress tolerance.

StoneSkin helps plants deal with:

  • heat
  • drought
  • pests
  • disease
  • wind and physical stress

Plants waste less energy “defending themselves” and more energy growing.

3. Improves Water‑Use Efficiency

Silica helps plants regulate water better. They:

  • take up water more efficiently
  • hold moisture longer
  • tolerate dry spells better

This is especially helpful in containers, hydroponics, and hot environments.

4. Supports Bigger Yields

Because the plant is sturdier and less stressed, it can focus on:

  • stronger vegetative growth
  • bigger leaves
  • heavier fruit
  • more vigorous flowering

Silica doesn’t create yield — it protects the plant so it can reach its potential.

5. Strengthens Stems and Branches

Silica reinforces the plant’s internal structure, so stems:

  • are thicker
  • snap less easily
  • can support more weight

This is why fruiting plants (tomatoes, peppers, cucumbers) and heavy bloomers benefit so much.

How You Use It

  • Mix 1 mL per litre of water
  • Use weekly or with every feeding
  • Works in veg and flower
  • Safe in soil, coco, hydroponics
  • Won’t clog irrigation or aeroponic emitters
  • Can be used as a foliar spray

What’s Actually Inside

  • Potassium silicate
    • Source of soluble silica
    • Source of potash (K)

Manufactured locally in Kingston, Ontario by EZ‑GRO.

Description

StoneSkin is a potassium silicate additive that helps your plants build stronger, sturdier cell walls. Think of it as a natural “armor” that supports your plant through heat, drought, pests, and disease — indoors or outdoors.

Silica is one of the most overlooked plant supports. When your plant absorbs potassium silicate, it reinforces its structure from the inside out. This lets the plant stand taller, hold heavier fruit and flowers, and use its energy for growth instead of constantly fighting environmental stress.

  • Strengthens plant cell walls
  • Helps plants handle heat, drought, pests, and disease
  • Improves water‑use efficiency
  • Supports heavier fruit and flower production
  • Encourages sturdier stems and overall structure

A plant with strong cell walls:

  • resists stress more easily
  • stands straighter and sturdier
  • supports bigger yields
  • grows more vigorously in all environments

Potassium silicate is the most ideal form of silica for plants — easily absorbed, highly effective, and even used industrially to strengthen concrete. It’s a simple way to improve structural integrity at every stage of growth.

  • Mix 1 mL per litre of water
  • Use once per week or with every feeding
  • Suitable for both vegetative and flowering stages
  • Works in all growing media, including hydroponics
  • Safe for drip irrigation and aeroponic emitters
  • Can also be used as a foliar spray

What’s Inside

  • Potassium silicate (source of soluble silica and potash)

Manufactured in Kingston, Ontario by EZ‑GRO.

Additional information

Weight 4 lbs
Dimensions 10 × 8 × 6 in
size

250ml, 1L, 4L, 20L