We Have Soil Products for You!

It’s time to prepare your soil!

Thank you to all those who helped us with a successful opening day, last Friday!  And a big thanks to those who braved the elements later in the weekend to stop by!  Throughout the month of March we’ll be open four days a week from 9 AM to 5 PM on Thursdays, Fridays, Saturdays and Sundays.

March is a great time to focus on soil enrichment and we’re stocked with great products that will help you prepare for the season ahead.  You’ll recognize many products which we’ve stocked for years and we’re also trying out some new and exciting items.  As always, we welcome your feedback on them all!  


This weekend we’re featuring three great classes.  We start on Saturday, March 9 at 10 AM, with two of our favorite Permaculturists, Tara Rae Kent and Daniela Escudero sharing some important principles to create more resilient and regenerative systems in our own gardens in their “Intro to Permaculture” class.  Free Admission! 

Stick around on March 9 because at 1:00 we have a one-time-only presentation on “Cover Crops: Why, How and Which” with Clark Harshbarger.  Clark who is employed with the USDA-NRCS as a soil scientist and recently as director of Regenerative Farming at MAD Agriculture, will soon be moving to eastern US.  For this special presentation we are renting a larger space next door at the Boulder Circus Center.  This special class is only $20.  (See the list of cover crop seeds that we’re offering, below.)

Finally on Sunday, at 1:00 pm, Mikl with share how to address “Fireblight” issues, which were a hardship for many gardeners last year.  See below for more details and call 303-939-9403 to reserve your seat!


Call 303-939-9403 to reserve your seat!

Our weekends are loaded with great classes you won’t want to miss! Our customers tell us that our classes have given them tremendous value, with practical and current information from local experts who have spent years honing their skills in Colorado and will help guide you to success. We are charging $15 (unless otherwise stated) for our classes to support our speakers and Harlequin’s educational direction. It is best to pre-register for these classes both in case they fill up, or too few people register and we have to cancel. Pre-payment assures your place in the class. You can register at the nursery, by mail, or by calling 303-939-9403. We are unable to take class registration by email at this time.  Most of our classes run from one-and-a-half to two hours in length, and sometimes longer for hands-on classes, or if there are a large number of questions.  See the complete March Class listing below, or on our website.  

Sat, Mar 9 at 10 AM
Introduction to Permaculture with Tara Rae Kent & Daniela Escudero  

Permaculture is a design science that is informed by cycles and patterns in nature. This helps us create more resilient and regenerative systems, whether those systems are gardens, farms, businesses, or events. We will explore the ethics that guide a permaculture design and the principles that help a design take form, as well as real life examples and projects that are a part of our lives. The class will include: 1) an introduction and exploration of the Permaculture Ethics and Principles, 2) real life, active and diverse examples of permaculture designs, and 3) a tour of Harlequin’s Garden’s Permaculture Design.  Free admission!  

Sat, Mar 9 at 1 PM
Cover Crops for Gardeners: Why, How & Which with Clark Harshbarger  

In the current soil revolution, we are learning how to nurture and care for our soils and the soil life that is the true source of soil fertility. Cover crops are becoming recognized as one of the keys to soil fertility and soil health. When our annual crops die in the fall, if we do not replace those crops with living plants, then the microbes that depend on the nutrients “leaked” into the soil from plant roots, will die or decrease. Besides that, cover crops are a method to use photosynthesis to grow organic matter and nutrients including nitrogen to add to the soil, so we have to buy fewer amendments. In addition, many cover crops support beneficial insects which help control pest insects, and they reduce erosion.
But which cover crops do well in Colorado and when do we plant them and when should we cut them, and how do we prevent them from becoming weeds or competitors? And how best to combine them?  Harlequin’s Gardens has been looking for someone to teach us these things, who really knows how to do it in our local conditions. And this year we found the right person. So this is a great opportunity that will not be available next year, because Clark Harshbarger will be moving to eastern US.  For the last two decades, Clark was employed with the USDA-NRCS as a soil scientist and recently as director of Regenerative Farming at MAD Agriculture.
We have rented a bigger space than our classroom, but people will have to register ahead of time to make sure they get a seat. Clark’s class will be held at the Boulder Circus Center, next door to Harlequin’s Gardens, south in the big metal building in the Trixie Room.  Register by phone at 303-939-9403. This will be a 2 hour class and we will be charging only $20

Sun, Mar 10 at 1 PM
Fireblight: Pruning, Nutrition & Culture with Mikl Brawner  

Last year was the worst year for this bad bacterial disease of apples and pears. Mikl has had over 40 years of experience with fireblight, and will teach and demonstrate proper pruning, and explain how to bring a tree back to health even if a lot of the tree is blighted. Class cost: $15


Sat, Mar 16 at 10 AM
Getting Started in Vegetable Gardening with Mimi Yanus  

If you are new to Colorado, new to vegetable gardening, or have been unhappy with the results of your earlier attempts, this class is for you. Learn from Mimi what you need to know to make your new organic vegetable garden successful and bountiful, even in Colorado conditions!  Class cost: $15.  (This class will be repeated on Saturday, April 6th at 10 am.) 

Sat, Mar 16 at 1 PM
Mason Beekeeping with Tom Theobald  

The importance of our native ‘solitary’ bee species to the pollination of our crops, flowers, and native plants is receiving increased attention. For over 30 years, Tom Theobald of Niwot Honey Farm has been propagating one of the most ‘useful’ species, Mason Bees (Blue Orchard Bees), and will teach how to attract and care for these gentle native pollinators. Mason Bees are not a replacement for honeybees, but they are excellent pollinators of the early fruits – cherries, apples, etc.  They stay close to home, don’t sting, don’t require the year-round commitment of a colony of honeybees and provide a great way to introduce children to the world of pollinators. Harlequin’s Gardens will have filled straws (containing male and female adult bees in hibernation) for sale for $12 a straw. 
IMPORTANT: You must RESERVE your Mason Bee straws IN ADVANCE by calling Harlequin’s Gardens at 303-939-9403. Pre-payment of mason bee straws is required. Class cost: $15.  (Note: this class is a repeat of Tom’s March 2 class.) 

Sun, Mar 17 at 1 PM
Dwarf Conifers for Gardens and Landscapes with Kirk Fieseler  

A renowned expert in conifers at Laporte Avenue Nursery in Fort Collins, Kirk Fieseler will discuss dwarf conifers for small landscapes and rock gardens. Learn the origins and propagation techniques for dwarf conifers as well as how to grow them in containers and in the garden. Kirk will talk about the most successful species for our climate and soils. Class cost: $15.  (Pictured right: Farmy, P. edulis. Photo by Kirk Fieseler.)

Wed, Mar 20 – First Day of Spring  

Sat, Mar 23 at 1 PM 
Get Equipped for Beekeeping with Kristina Williams  

For beginning and established beekeepers, alike!  Kristina will demonstrate how to build and crosswire frames. Learn the lingo of beekeeping supplies and take a tour of our Bee Barn. Harlequin’s Gardens is upgrading frames and foundation to be as strong as they can be and still use beeswax. Our resident entomologist and Bee Barn Babe, Kristina Williams, will share her vast knowledge with you!  Free Admission!   (Photo credit, right: Red Hot Pepper) 

Sun, Mar 24 at 1 PM
Building Topsoil & Fertility with Mikl Brawner  

Mikl will discuss how to support soil life, enrich poor soils, and improve plant health and nutrition from the bottom up: composts, fertilizers, mulching, worms, deficiencies, and tilth. Class cost: $15

Sun, Mar 31 at 1 PM
Cold Hardy Cacti and Succulents with Kelly Grummons  

We are proud to present acclaimed CO horticulturist Kelly Grummons, director of Prairie Storm Nursery, a business that includes ColdHardyCactus.com and DogTuffGrass.com!  An expert in selection and propagation of rare and unique plants for Colorado, Kelly will discuss a variety of exceptional new winter hardy cacti, agaves, yuccas, and outdoor succulents, and include choosing appropriate sites, soil prep, fertilizing, and ongoing care. Class cost: $20.   (Photo credit, left: ColdHardCactus.com) 

Products for Building and Supporting Healthy Soils

Harlequin’s Gardens has been studying soil health for many years now, because soil health is needed for plant health, for plant resistance to pests and diseases and for nutritional value of plants. We believe that a strong Soil Life with all the beneficial fungi, bacteria, earthworm etc. is the goal to digest the nutrients in the soil and make them into plant-available forms.

Our soils also are deficient in organic matter and available nutrients. Colorado soils do have nutrients, but many are not in a form that’s available to plants. So, Harlequin’s has sourced most of our soil-building products from businesses as local as possible, almost all from Colorado. Local products use our local wastes (like landscape wastes, beer wastes, food wastes, beetle-kill pine, mushroom waste, dairy cow manure, chicken manure). This supports local businesses to recycle and because trucking distances are greatly reduced, we are cutting down on carbon emissions. Putting these organic wastes into the soil also sequesters carbon. And because carbon is one of Life’s main building blocks, these products help build fertility.

This year we have many returning products and some new products that we’d like to tell you about.


This is a mined carbon concentrate that multiplies microorganisms and has the effect of making nutrients in the soil available. We have been using this for years in our potting mixes. 

Corn Gluten

A non-toxic, weed-and-feed with 9% nitrogen. It inhibits seed germination, but is harmless to plants with root systems, people, worms, and microorganisms. The effect can last up to 6 months and is especially useful in lawns. Apply in September/October, and again in late February/March to prevent the majority of existing weed seeds from germinating.

Alpha One

100% organic fertilizer for vegetables and ornamentals. Contains: 7% Nitrogen, 2% Phosphorus, 2% Potash, 1% Iron, 1% Sulphur, with a pH of 6.2.  Formulated in Loveland for Colorado Soils. 

Richlawn 5-3-2 Fertilizer 

A 100% organic product comprised of dehydrated poultry waste.  It is listed by OMRI for organic use and is ideal for lawns, trees, shrubs, annuals, perennials, vegetables and roses.  One bag covers 2,000 sq. ft. of turf.

EcoGro Compost

A Class 1 Compost made from leaves, grass, chipped branches, and beer wastes. It has a healthy population of microorganisms and diverse nutrients.  It is very stable and will not burn or steal nitrogen.  It is fine textured, low in salts with some woody particles.  The pH is 8.3; the NPK 1-1-1.

Eko Compost

Made from forest and recycled wood products composted with poultry manure. Use Eko Compost in vegetable and flower gardens, on lawns, trees, shrubs. to Improve soil’s physical, chemical, and biological health.

Eko Lawn Topdressing

Finely screened compost perfect for top dressing lawns after aeration.  Holds moisture next to the roots increasing drought tolerance. Supports microorganisms. 

Symbiosis Potting Soil – NEW! 

Symbiosis Potting Soil is a plant-based compost, made from coconut coir, perlite, azomite minerals, calphos, rock dust, kelp meal, oyster shell, dolomite lime, earthworm castings, mycorrhizae and Alaska humus.     

Fort Vee Potting Mix – NEW!  

This compost-based potting mix is best for starting seeds and transplanting seedlings and houseplants. It is composed of composted manure and plant material, peat moss, crushed granite and basalt, blood meal, kelp meal, bone meal, gypsum, vermiculite, coconut coir and biodynamic preparations. It’s best to wet before use. Used very successfully last year at Kilt Farm.  

Ocean Forest Potting Soil

A nutrient-rich soil for planting seedlings. It performed well in our tests. Contains: composted bark, sphagnum peat, fish emulsion, crab, earthworm castings, loam, perlite, bat guano, granite dust, kelp meal.


A natural pine coop bedding (or cat litter!). Contains recycled beetle-kill pine and activated carbon, making it very absorbent, with powerful odor control. It outperforms and outlasts hay and wood shavings. Expands up to 5X when wet. Reduces cleaning by 50%. Not a soil amendment, but a local, recycled beetle-kill pine product to help care for your poultry and other small animals.

Products Coming Soon!

Harlequin’s Fertility Mix

A mix of Biosol Certified Organic 6-1-1 Fertilizer, humate, molasses, endomycorrhizae, and calcium. Increases root mass, top growth, soil life, and productivity naturally.  This is not just a fertilizer. The combination of ingredients and mycorrhizae act synergistically to support fertility.  It has received rave reviews!  Try it and let us know your experience. 

Rocky Mt. Minerals

From Salida, this broad spectrum of many different minerals that support plant strength and immune function, including 11% Calcium, 6% Sulfur plus magnesium, iron, and many others. The big difference with this product is that its geothermal source makes these minerals much more available. 

Mushroom Compost

From a local mushroom farm.  Dark, rich humus that feeds soil life, improves soil structure & aeration, saves water. Great soil amendment for veggies, perennials, roses & shrubs. Also, a superb mulch for roses. 

Dairy Cow Manure Compost

Nutrient-rich compost made from manure of dairy cows – NOT fed hormones and only given antibiotics when sick. (No rBGH given.)  

Coco Loco Potting Soil

A superior coir-based potting media produced from coconut husks, making it one of nature’s most abundant renewable resources.  This mix also contains earthworm castings, bat guano, kelp meal and oyster shell.  It resists compaction, easily rewets, and absorbs evenly for excellent aeration and maximum drainage.


A highly adsorbent, specially-produced charcoal applied to soil as a means to increase soil fertility and agricultural yields and sequester carbon.

Related New Products

Two great publications by the highly respected Bio-Integral Resource Center (BIRC), who specializes in finding non-toxic and least-toxic, integrated pest management (IPM) solutions to urban and agricultural pest problems.

“Alternatives to Glyphosate” – NEW! 

Glyphosate is the main ingredient in Roundup herbicide, and a probable carcinogen. This resource is derived from the latest scientific research.  

“IPM for Cannabis Pests” – NEW!

Registered insecticides are illegal and toxic pesticides make no sense.    

Insect Saver – NEW! 

Having trouble with insects in your house?  Catch wasps, bees, moths, flies, spiders, beetles, even earwigs, one-handed, swiftly, easily, without hurting them!  Observe the insect through the clear container, then open it to release them outside.   This is the German-made Schutzgreifer that we have been searching for. We had purchased a couple of these nifty devices and used them for years, but couldn’t find a supplier. Now we have them and you can too! They operate one-handed, like scissors: simply open, place over the insect and gently close. Even works on drapes and upholstery.   

Cover Crop Seeds – NEW! 

We’ve expanded our offerings of cover crops to better meet your gardening needs.  

  • Fall / Winter Cover Crop Mix
  • Spring / Summer Cover Crop Mix
  • Ephraim Crested Wheatgrass
  • Blue Grama
  • Hairy Vetch
  • Red Clover
  • Austrian Winter Peas
  • Daikon Radish
  • Dwarf Essex Rapeseed
  • Annual Sunflower
  • Quatro Sheep Fescue
  • Morgan Spring Oats (organic)
  • Spring Triticale
  • Buckwheat (organic)
  • Organic Spring Cover Crop Mix
  • Harlequin’s Gardens Mountain Native Mix
  • Harlequin’s Gardens Foothills native Mix
  • Harlequin’s Gardens Xeric Mix


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Social Media

Please follow us on Facebook, Instagram and Twitter for the most up-to-date information and photos! We’re looking forward to seeing you this week!  In March we are open every Thursday-Sunday, 9-5.