Metro-Grower™ ‐ A New Way To Garden


The Metro-Grower™ is a compact, sub-irrigation organic growing system, watering plants from the bottom up as nature intended. It’s a perfect fit for the gardener with limited space. It can be used almost anywhere – a patio, porch, balcony or backyard. The Metro-Grower™ will produce bountiful harvests: an early spring planting of peas, a summer collection of lettuce and greens, and a fall harvest of kale or spinach. The instruction manual illustrates how to grow vegetables vertically, including squash cucumbers, beans or peas. It is also ideal for the standards like tomatoes, strawberries, ornamental plants and more.


Permanent Airspace

The sub-irrigation watering design waters plants the way nature intended – from the bottom up.
Permanent Airspace is created under the soil separator between the soil above and the water reservoir below. The Permanent Airspace allows the plant roots to safely enter the water in the reservoir. The plant roots pull the water upward thru the Permanent Airspace into the soil above drawing nutrients with it.

“A pint of water at the root is worth a GALLON on the soil above,”
-Stephen Martin, Garden Writer, UK.

The Metro-Grower™ takes the guesswork out of watering.
The exposed water reservoir, only found in the Metro-Grower™, is always visible. You can see exactly how much or how little water your particular crops desire. This is a healthy, sustainable way to water your plants. As the water is drawn upward, it delivers essential nutrients to your plants rather than those nutrients being washed away when you water from above.


Eliminates Circling Roots

According to Oregon State University, “Circling roots are common problems in growing containers. Plants have difficulty getting nutrients, shortening plant’s life span.” Roots that are circling inside a growing container are more susceptible to the negative effects of excess heat, drought and disease. When plant roots in the Metro-Grower™ are exposed to the Permanent Airspace, “Circling roots are ‘burned’ off or pruned by the air, causing the plant to constantly produce new and highly branched roots,” according to Washington State University. This stimulates further growth of much wanted secondary roots that branch out within the growing medium.

circling_roots airspace_split

Garden With The Pro’s Using Our Living Soil Mix

You provide three gallons of organic compost or good garden soil. The Metro-Grower™ comes with organic soil amendments and fertilizer allowing you to produce a biologically diverse and balanced living soil mix. Our testing has shown proven results that our mix outperforms all major organic soil mixes, including synthetic fertilizers like Miracle Grow.


Illustrated instructions

Illustrated instructions


  • coir-minerals_bulletCoir, a byproduct of coconut harvesting, has high water holding capacities and provides plant roots with excellent drainage. Coir creates a spongy texture in the soil which assists plants in developing elaborate root systems.




  • trace_mineralsTrace Minerals are essential for building rich, fertile soils. Minerals increase the plant’s nutritional value and promote overall health of the soil, the people, and animals that rely on them for food.




  • pumice_bulletPumice, a natural volcanic rock, is an aggregate that increases the moisture and nutrient retention in soil containers. Pumice is a superior soil amendment in comparison to rock wool, perlite, and vermiculite. Pumice will never deteriorate. It continually provides excellent soil aeration and drainage.




  • vermicompost_bulletVermicompost, or worm compost, is the end product of the breakdown of organic material by worms. Vermicompost uses worms and microorganisms to turn yard or kitchen waste into usable, nutrient rich soil. Earthworms use their digestive tracts to increase the amount of nutrients and enzymes in the finished compost while acting as a catalyst to speed up the composting process.




  • soilkeySoilKey, our organic fertilizer with low N-P-K (Nitrogen, Phosphorus, Potassium) containing nutrients and micronutrients is designed to increase the biological activities in the soil, compost, and vermicompost. With the addition of SoilKey, these aerobic microorganisms multiply exponentially, building sustainable colonies and allowing the microbes to unlock the nutrients that are beneficial to plant vitality and growth.




  • mycorrhizae_bulletMycorrhizae, a beneficial fungus that increases the surface absorbing area of plant roots. Mycorrhizal fungi colonize on the plant roots and extend into the surrounding soil, forming a symbiotic relationship between the fungus and the plant roots. They increase the plant root’s ability to absorb water and nutrients while improving plant survival, vigor and health. It can create a higher transplanting success rate because of faster root establishment.




  • mulch_bulletCoir Mulch, a by product of coconut harvesting, when used to cover the potting soil once the seedlings have developed two true leaves. This will help prevent loss of moisture in the soil and reduce the possibility of any weed seeds germinating.


Ready To Grow In 3 Easy Steps

1. Mix the provided soil components plus 3 gal. of organic compost that you supply in a wheelbarrow or container.
2. Add water to the mix
3. Your Metro-Grower is now ready to plant and grow organic vegetables

Made In The USA, High Quality & Backed By A 5 Year Warranty

The Metro-Grower is constructed of UV protected food-grade plastic and holds a utility patent making it the only growing container of its type sold today.


Why are Trace Minerals Important?

urbin_greensBoth plants and animals, including humans, benefit from a regular supply of trace minerals, which are best transferred to the human body through vegetables grown in soil rich in trace minerals.

Today nearly all commercial agriculture land is depleted of trace minerals, due in part to the exclusive use of chemical fertilizers and ground water pollution.
By mixing the ground coir with trace minerals into the soil mix for your Metro-Grower™ and growing your own food, you ensure that those essential nutrients are added back into your diet.



Interested in learning more about container growing? Click here!


Did you know that sub-irrigation containers can help grow more successful crops, are easy to manage and can be placed almost anywhere? Find out how with this illustrated guide to sub-irrigation garden containers.

“Air is as important to root growth as water, accelerates plant growth, increases plant vigor and creates non‐circling roots.”

– Ralph Rhoads, Metro-Grower Advocate

“Circling roots are ‘burned’ off or pruned when exposed to AIR, causing the plant to constantly produce new and highly branched roots.”

– Washington State University

“Circling roots (in potted) plants have difficulty getting enough water and nutrients shortening plant’s life span.”

‐ Oregon State University


Growing Container Size: 16″x16″x9″
Growing Container Volume: 6 gallons
Saucer Size: 20″x20″x2″
Saucer Water Reservoir Capacity: 1.5 gallons

Metro-Grower™ PLUS

The Metro-Grower™ PLUS solves the persistent problems of growing in a container. It utilizes a compact, subirrigation organic growing system, watering plants from the bottom up as nature intended.



  • 1 Growing Container
  • 1 Soil Separator
  • 1 Watering Tray
  • Set of seed trays
  • 1 1.75-gallon bag of dry, screened coir container trace minerals
  • 1 gallon volcanic pumice
  • 1 cup vermicompost
  • 1.3 cups SoilKey
  • 3 gallons organic compost
  • 1 brick of coir mulch
  • 1 bag mycorrhizae
  • Online Video and Manual
  • Warranty card





Metro-GrowerTM Basic

Facilitates growth through a mixture of all natural soil amendments and a sub-irrigation reservoir. You’ll never have to fuss with watering again! Basic kit is the container only, you will need to add your preferred soil mix.



  • Growing container
  • Watering reservoir
  • Soil separator
  • Instructional manual




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