SILICA · Silica additive
Build a tougher plant.
Silica isn’t fertiliser — it’s structure. SILICA is 31% silicon (as monosilicic acid) plus 21.2% K2O from potassium silicate, and it supports cell-wall strength.
Australian-made · 26 years in the US · 31% silicon · 21.2% K2O
Why it matters
Silica for cell walls.
Silica lays into the cell walls the plant builds, supporting cell-wall strength in stems, leaves and roots.
Stronger cell walls
Silica reinforces the plant’s own structure.
Low dose
0.33 ml/L, every feed, veg to early flower.
Add it first
Into the tank alone, before anything else.
What’s in the bottle
Structure, from the inside.
Here’s what’s actually in it — read straight off the current bottle — and what each part does for the plant’s own structure.
Potassium silicate Mineral salt
Silica plus potash — strongly alkaline, which is why it goes into the tank first, alone, before anything else. Deposits into cell walls, stiffening the whole plant.
silicacell-wall strength
Monosilicic acid Plant-available silicon
The plant-available form of silicon — the second half of the label’s silica load, reinforcing structure from the inside out.
siliconcell-wall strength
Why growers run it
Skip it vs. run it.
No silica
✗
Soft growth that flops under weight.
✗
Stress hits hard and lingers.
✗
No silicon in the feed.
✗
Nothing reinforcing the structure.
With SILICA
✓
Firm stems that hold heavy bud.
✓
Added first, at 0.33 ml/L.
✓
Supports cell-wall strength.
✓
Reinforced from the cell wall out.
A little goes a long way
1 L → 3,000 L
of finished feed at just 0.33 ml/L — structural insurance for pennies a watering.
Proof — label & MSDS
Straight off the label.
Silicon · K2O
31% · 21.2%
Type
Silica additive (K-silicate)
Dose
0.33 ml/L
Made in
Australia
Potassium silicate + monosilicic acid
100% biodegradable
pH 8–10
By Agricultural Organics, South Australia
Silicon (as monosilicic acid) and K2O (from potassium silicate) from the product label. Composition and properties from the manufacturer MSDS.
When to use it
Veg to early flower.
Seedling
Veg
Early flower
Late flower
Flush
Add FIRST, before nutrients0.33 ml/L
Veg → early flowerweekly
Taperlate bloom
Build it tough.
Add it first.
Shop SILICA →
Or DM FEED CHART to @bloom_crew_nate for your full feed schedule.
Images on this page are a mix of real photos and AI-generated illustrations, used to show how things work.