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Harlequins Gardens

Harlequins Gardens

Boulder's specialist in well-adapted plants

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Home | Waterwise garden

Waterwise garden

YUCCA EXTRACT: Ordinary magic for drought stress and water and nutrient absorption

September 8, 2026

Sledge Hammer

Yucca glauca is our local native yucca. The common name is Soapweed, because native Americans used the roots to make soap. Harlequin’s Gardens has been using an extract of Yucca schidigera, Mojave Yucca, in our plant production for 30 years. Yucca roots are high in saponins which are plant chemicals that are both water and fat soluble. In nature, the saponins enhance nutrient absorption and serve as antifeedants to reduce pest damage.

The yucca product that we carry for our customers has the terrible name ‘Sledgehammer’, because it breaks down salts from high fertilizer use. We offer it for its natural function to release the surface tension of water which greatly helps water absorption into the soil and into the roots and through the cell walls of plants. These effects are particularly useful in helping seeds to germinate and helping drought-stressed plants absorb water and more quickly recover from dehydration.

The label says that Sledgehammer is just yucca. Use it at two teaspoons per gallon of water in normal watering.

We routinely use yucca extract as an emulsifier and ‘sticking’ agent whenever we are applying any kind of spray to plant foliage. This includes foliar feeding, horticultural oil sprays for pest management, or liquid kelp spray for toughening the leaf cuticle to block disease spores.

Mikl figured that if yucca helps with water absorption, then it could help with dehydration that comes with working outside and forgetting to drink water, so he takes one yucca capsule (made by NOW) a day. Yucca has the added benefit of improving nutrient absorption and reducing joint pain. It is said to improve digestion and support gut health.

 

 

 

 

Water-Wise Plants for a No-Water Garden

August 18, 2026

In our 35 years of experience gardening on our two-acre property in the rocky short-grass prairie in far-north Boulder, CO, we have found the plants listed here to grow successfully without supplemental watering once established. The early years of the gardens were blessed with more natural precipitation than we are experiencing now. Some plantings receive more attention than others, but these plants have all managed without irrigation for long stretches of time.

Acer negundo Boxelder Maple
Agave parryi Parry’s Agave
Allium tuberosum Garlic Chives
Argemone polyanthemos Prickly Poppy
Artemisia filifolia Sand Sage
Artemisia frigida Fringed Sage
Artemisia ludoviciana Silver King Artemisia
Artemisia tridentata Big Sage
Buddleia alternifolia argentea Silver Butterfly Bush
Celtis occidentalis Western Hackberry
Celtis reticulata Netleaf Hackberry
Cercocarpus intricatus Littleleaf Mt. Mahogany
Cercocarpus ledifolius Curlleaf Mt. Mahogany
Cercocarpus montanus Trueleaf Mt. Mahogany
Chamaebatiaria millefolium Fernbush
Cleomella serrulata Rocky Mt. Bee Plant
Cotinus ‘Grace’ ‘Grace’ Smoketree
Cotoneaster lucidus Hedge Cotoneaster
Cotoneaster racemiflorus var. soongoricus – Redbead Cotoneaster
Crataegus ambigua Russian Hawthorn
Crataegus phaenopyrum Washington Hawthorn
Cupressus arizonica Arizona Cypress
Ericameria nauseosa Tall Blue, Tall Green and Dwarf Blue

Fallopia aubertii Silver Lace Vine
Foeniculum vulgare Purpureum Bronze Fennel
Forestiera neomexicana Desert Olive
Glaucium acutidentatum Horned Poppy
Gleditsia triacanthos Honeylocust
Helianthus annuus Common Sunflower
Helianthus salicifolius Willow Leafed Sunflower
Iris germanica Bearded Iris
Juniperus monosperma One Seed Juniper
Juniprus scopulorum Rocky Mt. Juniper
Koelreuteria paniculata Golden Rain Tree
Limonium gmelinii Siberian Statice
Linum lewisii Native Blue Flax
Mahonia aquifolium Oregon Grape Holly
Mahonia fremontii Desert Holly
Malus other apples
Malus Royalty Royalty Crab
Marrubium cyllenaum Greek Horehound
Marrubium rotundifolium Silver Edged Horehound
Morus tatarica Hardy Mulberry
Penstemon Many species
Philadelphus coronarius Sweet Mock Orange
Pinus edulis Pinyon Pine
Pinus ponderosa Ponderosa Pine
Prunus americana American Plum
Prunus virginiana Canada Red Chokecherry
Prunus virginiana Chokecherry
Rhus glabra cismontane
Rhus trilobata Threeleaf Sumac
Rocky Mt. Sumac
Rosa eglanteria Sweetbrier Rose
Rosa Fruhlingsgold Spring Gold Rose
Rosa Henry Kelsey Henry Kelsey Rose
Rosa John Davis John Davis Rose
Rosa moyesii Eddy’s Jewel Rose

Sedum many varieties
Sphaeralcea fendleri Tall Globemallow
Syringa vulgaris Common Purple Lilac
Tanacetum parthenium Feverfew
Yucca baccata Banana Yucca
Yucca glauca Plains Yucca

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We do not ship plants!

Our plants are for sale ONLY at our Boulder location. We DO NOT ship plants or any other products.  Come visit us!

Hours by Season

MARCH HOURS
Thursday-Sunday, 9AM-5PM

STARTING APRIL 1
Tuesday-Sunday, 9AM-5PM

 

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Contact Us

303-939-9403 (Retail)
staff@harlequinsgardens.com

4795 North 26th St
Boulder, CO 80301

Sign-up for E-Newsletters!

Sign-up for our weekly e-newsletters to receive empowering gardening tips, ecological insights, and to keep up on happenings at Harlequin’s Gardens — such as flash sales and “just in” plants. We never share customer’s addresses!

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Our Hours

Mondays, CLOSED

JANUARY-FEBRUARY HOURS:
Thursday-Saturday, 10AM-4PM

MARCH HOURS:
Thursday-Sunday, 9AM-5PM

APRIL-SEPTEMBER HOURS:
Tuesday-Sunday, 9AM-5PM

OCTOBER HOURS:
Thursday-Sunday, 9AM-5PM

Closing after Nov. 1

The plants we grow are organically grown. All the plants we sell are free of bee-killing neonicotinoid pesticides.