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Grodan is classified by W.H.O. (World Health Organization) as a bio-soluble product. International cert. ISO 9001 & 4001, and European Ecolabel. Information compiled here is in accordance with the latest knowledge at time of writing however Grodan cannot assume liability for the use of its contents.

© Copyright 2013 Grodan, Inc. Grodan and Pargro are registered trademarks. A-OK Starter Plugs, MINI-BLOCKS, MACROPLUG, GRO-BLOCKS, GRO-SLABS, GROW-CUBES, GROW-CHUNKS, HUGO, BIG MAMA, UNI-SLAB, GRO-SMART TRAY and Pargro QD (Quick Drain), are trademarks of Grodan, Inc. All rights reserved.

Printed APR/2013 by Grodan, Inc.

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GROW-CUBES/GROW-CHUNKS vs. Clay Rocks• Use either GROW-CUBES or GROW-

CHUNKS (also known as croutons) for your plant medium.

• If using clay rocks, mix in GROW-CUBES (50/50 mix). The more croutons, the bet-ter the growth.

• More feeder roots develop in stonewool than in other media, providing for faster plant growth.

• Grodan Rockwool is lightweight, making it easy to transport and pour.

• Keep your system cleaner by using Gro-dan products (no dirty clay sediment at the bottom of the buckets).

Using Grodan in Watch video on How To Use Grodan on WWW.GRODAN101.COM.

Did you know that roots will adapt to the media they grow in? For example, a course-grade medium (such as rocks) produces thicker roots to anchor the plant. Whereas a fine-grade medium like Grodan will produce more feeder roots that are thinner, like tiny hairs. These tiny hair-like roots that plants produce have a greater surface area which enables them to uptake nutrients more efficiently.

More feeder roots means faster plant growth.

Hydrogardening Bucket Systems

• Experience easier transition (less shock) from plants growing in Grodan starters or GRO-BLOCKS transplanted

into a bucket filled with more Grodan.

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Why Grodan?For greater success with your Flo-n-Gro®, skip the rolling clay balls and other media. There is a natural product that works better – Grodan.

The following products are perfect for use in the Flo-n-Gro® system:

GROW-CUBES™ (small croutons) can be used on their own or mixed in 50/50 with clay rocks to improve growth in place of just rocks.

GROW-CHUNKS™ (large croutons) are the larger version of the croutons. Use these on their own (or mixed with GROW-CUBES) since the pieces are too large to easily mix uniformly with clay rocks.

GROW-CUBE vs. GROW-CHUNK

Using Grodan Rockwool in the Flo-n-Gro® System

• Generally no pH adjusting is needed, just soak your croutons in plain water before use. But if you have hard water (high pH), soak in water adjusted to pH 5.5.

• Drain the croutons to waste by pouring them in the mesh inserts provided with your system.

• When fully drained, place the mesh inserts into the blue buckets.

• Make sure the grow area is clean.• Set up the system according to the Flo-n-Gro®

instructions.• Use GROW-CUBES, GROW-CHUNKS or a mixture

of both sizes.• If mixing with clay balls, choose GROW-CUBES. • We recommend a 50/50 mix. The more Grodan

used, the better the results.

• Fill the system’s reservoir with a hydroponic solu-tion. For example, EC 1.5 and pH 5.8 works well.

• We recommend using Grodan starters and GRO-BLOCKS™ for the best transplants, but you can transplant from any medium into the croutons.

• Carefully transplant each plant into the buckets.• Once transplanted, begin your watering cycle.

• Flood once a day for 15 minutes one hour after lights come on to achieve sufficient growth. Do not feed more than twice daily for best results.

• Adjust flooding frequency and cycle length accord-ing to the growing environment and stage of plant growth. (Using this sytem outdoors may require more than two floods per day with GROW-CUBES.)

• Check pH and increase EC (or PPM) as the plants grow. Switch to a bloom solution when the plants begin to flower.

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