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STRONGER STEMS IN 2–3 WEEKS OR MONEY BACK25% OFF 1-GAL PAILS · END-OF-SEASON RUNOMRI LISTED · CDFA REG · FARM MILLED
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Si

OMRI LISTED

CDFA ORGANIC INPUT

BY GROWERS, FOR GROWERS

OMRI LISTED

CDFA ORGANIC INPUT

BY GROWERS, FOR GROWERS

Your soil is running without
the missing element.

14

28.086

Si

the missing element

Plant-available silica hardens stems, defends against mildew and pests, and buffers heat and drought — before the stress arrives. Dry, micronized volcanic minerals from Southern Oregon. Gentle on pH. Soil, foliar, or fertigation.

Plant-available silica hardens stems, defends against mildew and pests, and buffers heat — before the stress arrives.

Shop the minerals
Which silica is right for me?
Shop the minerals
Which silica is right for me?

✓ FROM $37.95

✓ A BAG LASTS THE SEASON

FROM $37.95 · A BAG LASTS THE SEASON · 10–15% MORE YIELD IN SIDE-BY-SIDE GROWS

✓ 10–15% MORE YIELD IN SIDE-BY-SIDE GROWS

14

28.086

Si

Silicon

the missing element

EVERY SEASON HAS VILLAINS

POWDERY MILDEW · BUD ROT · SPIDER MITES · SNAPPED BRANCHES · HEAT-FRIED HARVESTS

MILDEW · BUD ROT · MITES · SNAPPED BRANCHES · HEAT · TIRED SOIL

SILICA IS THE ARMOR YOU ADD FIRST

WHY SILICA

Silicon builds the plant’s armor. Almost no fertilizer replaces it.

Second most abundant element in the earth’s crust — yet locked away in most soils, and missing from nearly every bag of fertilizer.

THE GAP

Modern soils are silica-depleted

Over-cropped fields, potting mixes, and containers run out. NPK feeds growth — it never hardens the plant. Your plants are growing without it.

THE GAP

Modern soils are silica-depleted, and NPK never hardens the plant.

WHAT IT DOES

Thicker cell walls and stems, mildew & pest defense, heat and drought tolerance.

WHY THIS ONE

Dry, micronized to 2–4 μm, organic-certified, pH-friendly — usable this season.

WHAT IT DOES

Hardens, defends, buffers

Silica thickens cell walls and stems, fortifies against mildew and pests, and builds heat & drought tolerance — proven across crops.

WHY THIS ONE

Dry, micronized, organic

Ground to 2–4 microns with naturally occurring plant-available silica — usable now, not after years of weathering. The only organic-certified dry silica.

PARTICLE SIZE IS THE PITCH

Smaller particle, faster uptake.

Most minerals take years of geochemical weathering before a root can use them. Micronized to 2–4 μm, Silica Earth is plant-available this season — with 4,500 ppm available silica when plants need just 30–60 ppm per feeding.

BEACH SAND
~100 μm

SILT
~10 μm

SILICA EARTH
2–4 μm

SMALLER PARTICLE, FASTER UPTAKE

BEACH SAND
~100 μm

SILT
~10 μm

SILICA EARTH
2–4 μm

4,500 ppm plant-available silica — plants need just 30–60 ppm per feeding.

THE DISTINCTION

Not another bottle of liquid silicate.

If potassium silicate spiked your reservoir and locked out nutrients, that wasn’t silica failing you — it was the form. This is a soil mineral, not a caustic chemical.

SILICA EARTH

LIQUID K-SILICATE

✓ Plant-available now

✕ Converts chemically first

✓ Gentle on pH

✕ pH ~12, spikes the res

✓ No added K — Ca & Mg instead

✕ 0-0-18 lockout risk

✓ A bag lasts the season

✕ Mostly water, re-bought

✓ OMRI · CDFA organic

✕ Mostly not certified

.

SILICA EARTH (DRY MINERAL)

LIQUID K-SILICATE BOTTLE

AVAILABLE FORM

✓ Monosilicic acid — the exact form roots absorb, ready now

✕ Must convert chemically before plants can use it

pH IMPACT

✓ Gentle on soil & reservoir — no pH adjusting ritual

✕ pH ~12 — spikes the res, needs careful buffering

POTASSIUM LOAD

✓ No added K — carries Ca & Mg plus trace elements instead

✕ 0-0-18 — excess K can lock out Ca & Mg

WHAT YOU PAY FOR

✓ Concentrated dry mineral — a bag lasts the season

✕ Largely water, re-bought all season

ORGANIC STATUS

✓ OMRI listed · CDFA-registered organic input

✕ Mostly not certified for organic programs

ALSO IN THE “TRIED IT” PILE: DIATOMACEOUS EARTH (SLOW) · RICE HULLS (BULKY) · FUNGICIDES (AFTER THE FACT) · HOPE (FREE, UNTIL IT ISN’T)

THE EVIDENCE

Proven under pressure.

Under-claimed on purpose. Proven under pressure.

Silica isn’t a miracle in a bag — it’s a foundational input that works with good growing. The benefits show up hardest exactly when it matters: under heat, drought, disease, and heavy fruit load.

SIDE-BY-SIDE GROWER TRIALS + PEER-REVIEWED FIELD STUDIES

10–15%

more biomass & flower weight in side-by-side grows

32–74%

water-use-efficiency gains reported in wheat field studies

10–15%

more yield in side-by-side grows

32–74%

water-use gains, wheat studies

+36%

water-use efficiency in corn

4,500

ppm

available silica vs 30–60 needed

+36%

water-use efficiency reported in corn under drought

4,500

ppm

plant-available silica — plants need just 30–60 ppm per feeding

WHO GROWS WITH IT

Built on a working farm. 
Used across every kind of grow.

FLOWERING CROPS

Heavy colas, hardened stems

Stronger branches that hold the weight, denser flower, and organic-clean defense against mildew and rot — without spiking reservoir pH.

FOOD GARDENS & HOMESTEADS

Tomatoes that take the heat

More heat- and blight-resistant vegetables from one dry amendment — worked into the bed or sprayed on. Simple and forgiving.

ORGANIC & REGENERATIVE

Remineralize, don’t compromise

The only OMRI-listed dry silica — volcanic remineralization that feeds soil biology, not a pH-11 salt input.

INDOOR, HYDRO & HOUSEPLANTS

No goopy bottle, no pH swings

Dry, easy-to-dose silica for soil or reservoir. A little goes a long way; stretchy, floppy growth stands up.

COMMERCIAL & GREENHOUSE

Fewer losses per acre

Micronized for fertigation — it won’t clog lines. OMRI protects your certification. Priced by the bag and the pallet.

LIVING-SOIL & KNF

Minerals your microbes can work

High-CEC volcanic clay plus optional Bacillus, mycorrhizae, humics and kelp — built for no-till beds and compost teas.
THE LINE

Four products. One active idea.

THE FOUNDATION · START HERE

Volcanic Silica Minerals

Pure micronized silica + Ca, Mg & trace elements.

$37.95
Shop Now

Pure micronized silica + Ca, Mg & trace elements. The base every grow should start from.

5 / 10 / 40 LB · 30 LB BOX

ADD THE BIOLOGY

Silica + Beneficial Microbes

Minerals + 4 Bacillus & 4 mycorrhizae species.

$29.95
Shop Now

The minerals plus 4 Bacillus + 4 mycorrhizae species that unlock them and colonize roots.

1 / 3 / 10 LB · LOWEST ENTRY PRICE

THE ALL-IN-ONE

Silica Soil Bio-Activator

Silica + humic & fulvic acids + kelp, in one scoop.

$54.95
Shop Now

Silica + humic & fulvic acids + kelp — a whole soil upgrade in a single scoop.

1 / 3 / 10 LB

FAST-ACTING · RESTOCKING SOON

Silica Root Zone

Immediate plant-available silica; frees phosphorus. $37.95 when back.

$37.95
Shop Now

Immediate plant-available silica that also frees phosphorus back into the soil.

SOLD OUT · $37.95 WHEN BACK
THE LINE

Four products. One active idea.

Start with the foundation. Add biology, bio-stimulants, or speed as your grow demands.

THE FOUNDATION · START HERE

Volcanic Silica Minerals

Pure micronized silica + Ca, Mg & trace elements. The base every grow should start from.

5 / 10 / 40 LB · 30 LB BOX

$37.95
Shop Now

ADD THE BIOLOGY

Silica + Beneficial Microbes

The minerals plus 4 Bacillus + 4 mycorrhizae species that unlock them and colonize roots.

1 / 3 / 10 LB · LOWEST ENTRY PRICE

$29.95
Shop Now

THE ALL-IN-ONE

Silica Soil Bio-Activator

Silica + humic & fulvic acids + kelp — a whole soil upgrade in a single scoop.

1 / 3 / 10 LB

$54.95
Shop Now

FAST-ACTING · RESTOCKING SOON

Silica Root Zone

Immediate plant-available silica that also frees phosphorus back into the soil.

SOLD OUT · $37.95 WHEN BACK

$37.95
Shop Now

NOT SURE? START WITH THE MINERALS. RUNNING LIVING SOIL? TAKE +MICROBES. WANT ONE BAG THAT DOES IT ALL? BIO-ACTIVATOR.

FIND YOUR FORMULA · 20 SECONDS

Four bags. One right answer for your grow.

Tell us how you grow — we point at the bag. No quiz funnel, no email gate.

YOUR MATCH → THE FOUNDATION

Volcanic Silica Minerals

The pure play: micronized silica with calcium, magnesium and trace elements. Top-dress at transplant, foliar through the season.

Shop Now

IN DOUBT? START HERE — IT’S THE BAG THE FARM WAS BUILT ON.

IN USE

Three ways in. Pick yours.

One dry mineral, three application routes, no special equipment, no pH ritual.

SOIL

Mix in or top-dress

Work into beds or containers at transplant. Feeds the root zone all season.

01 · SOIL

Mix in or top-dress

Into beds or containers at transplant.

02 · FOLIAR

Spray through the season

Armor on the leaf, where mildew lands.

03 · FERTIGATION

Run it through the lines

2–4 μm — won’t clog drip or sprayers.

FOLIAR

Spray through the season

Suspends fine at 2–4 μm. Armor on the leaf surface, right where mildew lands.

FERTIGATION

Run it through the lines

Micronized so it won’t clog drip or spray rigs — used in commercial fertigation.

WHEN TO APPLY · A SEASON AT A GLANCE

Transplant
Mix into the root zone

Veg
Top-dress + foliar every 2–3 weeks

Early flower
Last top-dress, first 2 weeks

Late flower → harvest
Nothing to flush

WHEN TO APPLY · A SEASON AT A GLANCE

IT’S A MINERAL, NOT A SALT — NOTHING TO FLUSH
Title

TRANSPLANT

Mix into the root zone

Work into beds, containers or the planting hole as you set plants.
Title

VEG

Top-dress + foliar

Repeat every 2–3 weeks while the plant builds its structure.
Title

EARLY FLOWER

Last top-dress

First 2 weeks of flower — stems set before the weight arrives.
Title

LATE FLOWER → HARVEST

Let the armor work

No late feeding, no flush — ride it to harvest.
THE ORIGIN

Spring 2015. One change. Our best season ever.

We added volcanic silica minerals to our Southern Oregon soil beds — and the farm outperformed every year before it. The mineral, sourced from shallow hydrothermal deposits once treasured by Native peoples of the region, became the product we now ship worldwide.

“No mites, no root-rot, no powdery mildew, no bud rot, and no broken branches.”

THE FOUNDERS · FIRST SILICA SEASON, 2015

SUPPLYING GROWERS SINCE 2018

RECYCLED PACKAGING

SHIPS WORLDWIDE

FROM THE FIELD

Growers like you, on the record.

“Added Silica Earth to several trays of hemp starts and noticed a difference right away in the strength, vigor and size compared to starts without.”

Owner · hemp start nursery

HEMP STARTS · SALEM, OR

“Noticed a difference right away in the strength, vigor and size compared to starts without.”

Hemp start nursery · Salem, OR

HEMP STARTS · SALEM, OR

“Definitely helped reduce the stretch and helped with node spacing and stalk strength.”

Indoor grower · flowering crops

HEMP STARTS · SALEM, OR

“Topdressed with Silica Earth for the first 2 weeks of flower. It definitely helped reduce the stretch and helped with node spacing and stalk strength.”

Indoor grower

INDOOR FLOWERING CROPS

“Your silica has provided some super strong, thick trunks and helped the growing creatures deal with this year’s fluctuating temperatures.”

Home grower

VERIFIED GROWER

“Works great in our compost teas… more microbial activity…”

Farm manager

COMPOST TEAS · SPRINGFIELD, OR

COMMERCIAL & BULK

COMMERCIAL & BULK

Buying by the acre, not the pouch?

✓ 40 lb bags & 30 lb boxes

✓ 2–4 μm — fertigation-safe, won’t clog lines

✓ OMRI / CDFA docs one click away

✓ Wholesale portal & pallet pricing
Talk to a grower
Wholesale login

A REAL HUMAN, NOT A FORM VOID

STRAIGHT ANSWERS

The questions skeptical growers actually ask.

You’ve been burned by an over-promised bottle before. Fair. Here’s the honest version — and a human to ask if it’s not covered.

Do I even need silica? Isn’t it already in my soil?

It’s in the ground — locked in forms plants can’t use. Over-cropped fields and container mixes are depleted, and fertilizer doesn’t replace it. That’s why we call it the missing element.

Will it spike my pH like potassium silicate did?

No. This is a gentle mineral, not a caustic pH-12 silicate — soil- and reservoir-friendly, no chemical pH adjusting required.

Powder can’t beat the liquid… right?

At 2–4 microns the mineral carries naturally occurring plant-available silica — ready now. Liquid silicates are largely water, and their silica must convert before roots can use it. Dry also means you’re not paying to ship water.

How do I use it — soil or spray?

Three ways: mix or top-dress into soil at transplant, foliar spray through the season, or run it through fertigation. Rates are on every bag and every product page.

When will I actually see a difference?

Structural and stress benefits build over weeks — and show up hardest under pressure: heat waves, humidity, heavy fruit load. It’s insurance you apply before the villain shows up.

Will the powder clog my sprayer or drip lines?

No — at 2–4 μm it suspends fine and is used in commercial fertigation. Mixing instructions come with every size.

THE MATH

A season of armor costs less than one lost plant.

One bag covers a home grow from transplant to harvest — soil, foliar and fertigation included. Compare that to a single branch snapped in August, or one bud lost to rot.

Shop the minerals

SEASON COST · 10-PLANT HOME GROW

VOLCANIC SILICA MINERALS · 2 LB

$49.95

PLANTS COVERED, TRANSPLANT → HARVEST

10

RE-BUYS BEFORE HARVEST

0
Title

PER PLANT, PER SEASON

≈ $5

LIQUID QUART, RE-BOUGHT MONTHLY

≈ 3× THE COST

SEASON COST · 10-PLANT HOME GROW

SILICA MINERALS · 2 LB

$49.95

PLANTS COVERED

10

RE-BUYS BEFORE HARVEST

0
Title

PER PLANT, PER SEASON

≈ $5

LIQUID, RE-BOUGHT MONTHLY

≈ 3× THE COST

COVERAGE MATH — CONFIRM AGAINST LABEL RATES BEFORE LAUNCH
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FREE GROWER GUIDE

Silica 101: the field guide

Silica 101: the missing-element field guide

What silica does, when to apply it, rates by crop, and the dry-vs-liquid truth straight to your inbox. 

Rates by crop, timing, and the dry-vs-liquid truth. Free. No spam.

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30-day guarantee

Not seeing results? We make it right.

Ships fast from S. Oregon

Same-week dispatch on every bag size.

Ships worldwide

Growers on six continents.

Certified organic input

OMRI listed · CDFA registered.

30-day guarantee

We make it right.

Ships fast

Same-week dispatch.

Ships worldwide

Six continents.

Certified organic

OMRI · CDFA.