PRO-MIX® HP® AGTIV® REACH™

High porosity growing medium

Former name: PRO-MIX® HP® MYCORRHIZAE

PRO-MIX® HP® AGTIV® REACH™ is perfect for growers that require a growing medium with good drainage, high air porosity and low water retention. The combination of fibrous Sphagnum peat moss and a high percentage of coarse perlite makes this formulation ideal for growers who require a growing medium product that is adapted to their needs for watering flexibility and crop seasonality. PRO-MIX® HP® AGTIV® REACH™ contains a beneficial endomycorrhizae that improves plant growth.

Learn more about the Open Top Grow Bag.

Benefits

Dries out more frequently than general-purpose peat‑based mixes
Well suited for low-light and high-humidity growing conditions
More difficult to overwater crops
Reduces incidence of water-related problems (root diseases, algae and fungus gnats)
Holds less water for improved leaching of fertilizer salts during crop cycles
Supports plant root systems
Enhances nutrient and water uptake
Produces more vigorous and healthy plants

Find a distributor Contact a representative

Recommended Usages

Ornamental

Annuals
Foliage plants
Potted flowering plants

Controlled-Environment Agriculture

Greenhouse vegetables
Vegetable transplants
Young plant propagation

Medicinal

Medicinal plants

Specifications

Inert ingredients

Sphagnum Peat Moss (65-75%)
Perlite
Calcitic and dolomitic limestone
Wetting Agent

Active ingredients

AGTIV® REACH™
- Mycorrhizae

AGTIV® REACH™ technology develops the root system, increasing nutrient and water uptake, which promotes plant growth, robustness and vigor.

Expands root system
Enhances nutrient and water uptake
Produces more vigorous and healthy plants

Physical Properties

Particle Size:
Coarse

Air Porosity:
High

Water Holding Capacity:
Medium

Bulk Density:
Low

Available Formats

Code	Size	Units per pallet	Weight
20281RG	2.8 cu ft Loose	57	25 - 35 lb
20381RG	3.8 cu ft Comp.	30	60 - 75 lb
20801RG	80 cu ft Loose	2	700 - 850 lb
21351RG	135 cu ft Comp.	1	2200 - 2700 lb

Download Safety Data Sheet

"I’ve been using PRO-MIX® since 1991 because of its perfect quality and unbeatable results. "

Saul Sanchez, Head Grower
Green Things. Tucson, AZ

"Best growing media"

Ian Gumto
Erich Gumto Greenhouses

Certifications

Sustainability

Veriflora Responsibly Managed Peatlands

Premier Tech’s peat moss comes from bogs that are certified under the Veriflora Program. This certification ensures the application of good management principles in all aspects of sustainable development. The criteria include environmental assessment, social engagement, and product quality.

Download certificate

Premier Tech, the Company Behind the Brand

Experts at your Service

Our dedicated team of experts is committed to ensuring that professional growers maximize the potential of PRO-MIX® products. We offer comprehensive support to help you enhance your expertise and achieve optimal results in your cultivation endeavors.

Learn more

Premier Tech Growers and Consumers Unmatched consistency

Superior Quality

We meticulously choose each element of our products, from the carriers to the biological active ingredients, and all other components in between. Our rigorous quality control spans from the bio fermenters to the final formulated products, ensuring every aspect meets our high standards. This meticulous attention to detail offers you peace of mind, knowing you're receiving only the finest quality products.

Unmatched Consistency

Our beneficial microorganisms are seamlessly integrated into our growing media. We meticulously verify the viability and efficacy of each batch produced, guaranteeing that your chosen product maintains its quality and delivers consistent results every time.

Ask for a demo

Frequently Asked Questions

How do I use PRO-MIX® HP®?

To use PRO-MIX® HP®, open the package, remove some PRO-MIX® product and place into a large tub or container. Lightly break up any clumps so that the PRO-MIX® is light and airy. Most growers prefer to add a small amount of water prior to filling containers. If you add water, add enough so that the PRO-MIX® product is slightly moist to touch. Do not saturate. Fill flats, containers and/or pots, without compacting the PRO-MIX® in the container. Plant your seedlings, young plants, etc., then water in containers.

What’s the difference between PRO-MIX® BX and PRO-MIX® HP®?

PRO-MIX® BX is a general-purpose growing medium, compared to PRO-MIX® HP® which is a High Porosity growing medium. These products are the same in pH and chemical properties. The difference is that PRO-MIX® HP® contains a higher percentage of perlite than PRO-MIX® BX. Perlite is a porous aggregate that does not absorb water.

When incorporated into growing media, perlite provides air porosity and reduces water retention. Since PRO-MIX® HP® contains a higher percentage of perlite than PRO-MIX® BX, HP® holds less water and is better suited for crops that are sensitive to overwatering, to low light growing conditions or for use in winter months when daylight is shorter.

What is the pH of PRO-MIX® HP®?

Using the Saturated Media Extraction test method (SME), PRO-MIX® HP® is formulated in a pH range of 5.2-6.2. Once the product is opened, crops planted and watered, limestone is activated and pH will reach 5.8-6.2 within 7-10 days.

Can you reuse PRO-MIX® HP®?

We do not recommend reusing PRO-MIX® HP® or any growing medium. There are many good reasons not to reuse, including changes to chemical and physical properties over time, diminished effect of wetting agent after use and/or transmission of root diseases to newly planted crops.

When to water PRO-MIX® HP®?

When irrigating, add water to PRO-MIX® HP® until it is saturated from top to bottom of the container. You will know you have accomplished this when water runs out of the drainage holes at the bottom of the container. Over time, allow the growing medium to dry-out without applying additional water. You will know when to apply water again when the surface of the growing medium turns color from a dark brown/black (wet) to a light brown/tan color (dry enough to rewater).

Does PRO-MIX® HP® have nutrients?

Yes, PRO-MIX® contains a starter fertilizer to help plants acclimate to a new rooting environment. We strongly recommended to initiate a fertilizer program within 7-10 days after planting. The fertilizer program you select should take into consideration water quality, crop type and the stage of plant growth.

Is PRO-MIX® HP® good for seedlings?

PRO-MIX® HP® can be used for transplanting seedlings. However, we suggest PRO-MIX® FPX for seed starting and seed germination.

Is PRO-MIX® HP® soilless?

PRO-MIX® HP® is a peat-based growing medium formulated with a high percentage of perlite. PRO-MIX® HP® and all PRO-MIX® growing media products are 'soilless', meaning that they do not contain any mineral soil.

Haven't found the answer to your question?
We are here to help you!

Contact us

Similar Products

PRO-MIX® HP® AGTIV® AMPLIFY™ GROW BAG

PRO-MIX® HP® AGTIV® AMPLIFY™ is perfect for growers that require a growing medium with good drainage, high air porosity and low water retention. The combination of fibrous Sphagnum peat moss and a high percentage of coarse perlite makes this formulation ideal for growers who require a growing medium product that is adapted to their needs for watering flexibility and crop seasonality. PRO-MIX® HP® AGTIV® AMPLIFY™ contains Bacillus, a bacterium that stimulates plant growth, and mycorrhizae, a beneficial endomycorrhizal fungus that supports plant root systems. Learn more about the Open Top Grow Bag.

PRO-MIX® HPCC AGTIV® REACH™

When seeking the ideal balance between air porosity, drainage and water retention, growers select PRO-MIX® HPCC AGTIV® REACH™ to optimize the quality of their hanging baskets, large containers, and long-term crops. With unique chunk coir and carefully selected fibrous Sphagnum peat moss, this formulation provides qualities that promote plant growth and root development. PRO-MIX® HPCC AGTIV® REACH™ contains a beneficial endomycorrhizae that improves plant growth.

PRO-MIX® CX

PRO-MIX® CX is a 100% coco-based growing media. With a unique blend of coir fiber and coir pith, it offers optimal water-holding capacity and porosity. Tailored for growers seeking precise control, its specialized formulation ensures an ideal environment for crop development. Learn more about the Open Top Grow Bag.