RIOCOCO Closed Bottom Propagation Plugs - 32mm

Low-EC Coir Propagation Plug for Consistent Early Rooting, 32mm

Cuttings and seedlings have almost no salt tolerance in the first days of root development, so a propagation plug carrying residual salts from processing can slow or stall rooting before it starts. RIOCOCO washes its coir fiber and pith to a target EC under 0.5 before pressing it into this 32mm plug, giving young roots a clean starting substrate with a documented 26% air-filled porosity and 64% water-holding capacity.

Each plug's bottom is sealed with a biodegradable paper-cellulose disc sized for standard 32mm propagation tray cells, keeping coir contained during handling while still draining freely once set in the tray.

Key Features & Benefits

• Washed coir under 0.5 EC — reduces residual salt levels in the substrate so tender new roots aren't stressed during the first days after sticking a cutting or sowing a seed.
• 26% air-filled porosity / 64% water-holding capacity — gives the plug a documented air-to-water balance suited to consistent root zone conditions across a full tray.
• Closed bottom, paper-cellulose seal — keeps coir fiber contained inside the plug during shipping and handling while remaining permeable enough for normal drainage.
• Compressed coir fiber and pith — combine for a stable plug structure that holds its shape through transplant rather than crumbling in the tray.
• 32mm sizing for standard trays — drops directly into common propagation tray cells without trimming or reshaping.

Who Should Use This Plug

Propagators starting cuttings or seeds in standard tray cells, whether a home grower running a single tray or a commercial nursery cycling hundreds of plugs per week, benefit from the plug's low starting EC and consistent porosity. It suits growers who want a ready-to-use coir plug rather than mixing and pressing their own propagation media.

About Riococo

Riococo (Ceyhinz Link, Inc.) manufactures coconut coir growing media, with roots in the coir industry spanning close to two decades and distribution into dozens of countries. The company processes its coir products, including this propagation plug line, specifically for use across cloning, seed starting, and general container growing.

Frequently Asked Questions

Why does starting EC matter in a propagation plug?

New cuttings and germinating seeds have very limited root systems and little tolerance for salt buildup, so a high-EC substrate can stress or stall early rooting. Washing the coir down to under 0.5 EC gives the grower a clean baseline to build a feeding program on from day one.

What does the closed bottom design actually do?

A biodegradable paper-cellulose disc seals the bottom of each plug to keep the coir fiber contained during handling and shipping. It still allows normal drainage once the plug is set in a tray, so it doesn't trap water at the base.

How do I prepare these plugs before sticking cuttings?

Pre-moisten the plugs with plain or lightly nutrient-dosed water before inserting a cutting or seed, since a fully saturated plug supports better root-to-media contact. Let excess water drain from the tray rather than leaving plugs standing in runoff.

What tray sizes are these plugs designed for?

These plugs are sized at 32mm in diameter to fit standard propagation trays built for that cell size. Confirm your tray's cell dimensions match before ordering in bulk.

Can these plugs be transplanted directly into soil or hydroponic systems?

Yes, once roots have developed, the whole plug can be transplanted directly into soil, soilless mix, or a hydroponic system without disturbing the root ball. This is one of the main advantages of a compressed coir plug over loose propagation media.