Factory-direct · Dust-free · Kiln-fired
Lighter pots.
Happier roots.
Nine Days makes expanded clay pebbles the way they should be made: pre-screened, precisely graded, and shipped straight from our factory to your garden.
- ✓ Two precise grades
- ✓ Pre-screened, no dust
- ✓ Reusable for years
Our products
Drainage Pebbles
1–3 cm (0.4–1.2 in)Open-air drainage for big planters, terrariums, and garden beds.
View the line →Hydroponic Grow Pebbles
8–16 mm (0.3–0.6 in)Pre-screened, dust-free media for semi-hydroponics and hydroponic growing.
View the line →- ~1,200 °C
- Kiln-fired, 2,190 °F — inert and permanent
- 300 kg/m³
- Lightweight — half the weight of gravel
- 100% clay
- No additives, no coatings, no organic matter
Two grades, two jobs
Big pebbles move water. Small pebbles move water and air to roots. Each grade is screened for one job, so you never have to sort by hand.
1–3 cm (0.4–1.2 in)
Drainage Pebbles
Open-air drainage for big planters, terrariums, and garden beds.
Extra-large clay pebbles that keep water moving and roots breathing. A lightweight, inert drainage layer that never compacts, never rots, and never needs replacing. The 1–3 cm grade leaves big, open air gaps at the bottom of your pot — excess water drains fast and roots never sit in a puddle.
8–16 mm (0.3–0.6 in)
Hydroponic Grow Pebbles
Pre-screened, dust-free media for semi-hydroponics and hydroponic growing.
Uniform, pH-neutral pebbles for semi-hydroponics and hydro systems. Pre-screened at the factory, so you skip the famous 'rinse it ten times' routine and go straight from bag to pot. Uniform 8–16 mm grading means consistent wicking and no chunky surprises.
Where our pebbles work
From a single planter to a full hydro system — one of our two grades fits the job.
Container drainage
DrainageA 1–3 cm layer at the bottom of planters and pots lets excess water escape fast — roots never sit in a puddle.
Rooftop & vertical gardens
DrainageAt 300 kg/m³ — half the weight of gravel — our pebbles cut the load on roofs and walls while keeping drainage open.
Terrariums & vivariums
DrainageInert and dust-free — a safe false bottom for planted terrariums and reptile enclosures.
Semi-hydroponics
HydroponicsUniform 8–16 mm pebbles wick water to roots in cache pots and net pots — the standard for growers converting to leca.
Aquaponics & hydro systems
HydroponicspH-neutral and pre-screened, they keep reservoirs clear and pumps unclogged in DWC and ebb-and-flow setups.
Seedling & cutting media
HydroponicsSterile and reusable — a clean rooting bed for cuttings and a tidy top layer for seed trays.
Our factory, our products
Two grades of expanded clay, kiln-fired and screened in our own factory.
Why Nine Days
Premium raw materials
Natural shale and clay, kiln-fired at ~1,200 °C. Stable, traceable quality — batch after batch.
Advanced kiln line
A fully automated rotary kiln with precise temperature control keeps every batch uniform in size and density.
Strict QC
Every batch is tested for strength, density, and water absorption. Test reports available on request.
Pre-screened, no dust
Every batch is screened at the factory to remove dust and fines. Open the bag, pour, done — no rinse-and-repeat ritual.
Graded, not guessed
Two precise grades — 1–3 cm for drainage, 8–16 mm for hydroponics. Consistent sizing means predictable drainage and wicking.
Factory-direct & fast shipping
We make the pebbles ourselves and ship them to you without the middlemen. Brand-grade quality at honest prices.
From the grow guide
Practical, no-fluff advice — same standard as our pebbles.
Basics · 4 min read
What Are Clay Pebbles, and Why Does Your Planter Need Them?
The beginner-friendly explainer: what expanded clay actually is, how it's made, and what those pebbles are doing at the bottom of your pot.
Read the guide →Drainage · 3 min read
How Much Drainage Layer Does Your Pot Actually Need?
The 2-inch rule, when to break it, and a simple sizing table — so you buy the right bag the first time.
Read the guide →Hydroponics · 6 min read
Semi-Hydroponics 101: Growing Plants in Clay Pebbles
The no-nonsense guide to moving plants from soil to leca — prep, setup, nutrients, and the mistakes that trip everyone up.
Read the guide →Get our drainage & hydro guides
One practical email a month — repotting season checklists, semi-hydro tips, and new bag sizes first. No spam, unsubscribe anytime.
Buying by the pallet or container?
Factory-direct wholesale pricing for garden centers, growers, and resellers. Message us — we reply within one business day.