• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Harlequins Gardens

Harlequins Gardens

Boulder's specialist in well-adapted plants

We Are Open Tuesday – Sunday, 9 – 5 for the season

Gift Memberships & Gift Certificates  – available online!
See our seasonal hours and address, below.

Read our latest e-newsletter!

  • Home
  • About
    • About Us
    • Staff
    • Display Gardens
    • Why the Name “Harlequin’s” Gardens?
    • Sustainability
    • Policy on Pesticides Including Neonicotinoids
    • Careers
  • What We Offer
    • Products
    • Plants
    • Retail Plant Pre-Ordering is Closed for the 2025 Season!
    • Gift Certificates
    • Membership
  • Plants
    • Annuals
    • Bulbs
    • Fruits
    • Groundcovers
    • Herbs
    • Natives
    • Ornamental Grasses
    • Perennials
      • Plants for Pollinators List
    • Roses
    • Vegetables
      • Tomato Starts
      • Pepper Starts
      • Other Vegetable Starts
      • Fall Vegetable Starts
      • Garlic
    • Xeriscape
  • Resources
    • Mikl’s Articles
    • Plant and Cultivation Information
    • Newsletters
    • Links
  • Garden Tours
  • Events
  • Classes
  • Blog
  • Wholesale
    • Who Qualifies
    • Wholesale Terms and Conditions
    • Wholesale Pricing & Sizes
    • Wholesale Log In
  • Contact
Home | Plant and Cultivation Information

Plant and Cultivation Information

RECOMMENDED GARDEN HELP

Recommended GardenersLandscapers

click link and download list


PLANTING INSTRUCTIONS and Recommended Varieties (Trees, Shrubs, Perennials)

Hardening Off

Perennial Wildflower Planting Tips from Clyde Robin Seed Company

Natives: to Plant & to Fertilize

Fruit Tree  Planting Instructions

Clematis Planting

Rose Planting

Water-Wise Perennials and Biennials for Sunny Locations

Water-Wise Trees and Shrubs for Sunny Locations

Fire-Wise Plants


VEGETABLE RESOURCES

Boulder Culinary Gardeners (BCG) Planting Calendar – Front Range Vegetable Planting Guide for Foothills and Plains

CSU Master Gardener Vegetable Planting Guide – Advice from our local CSU Master Gardeners on when to plant various veggies.

Asparagus

Garlic

Hardening Off – The process of acclimatizing a plant to the wind, sun, and temperature elements.

Harvest Guidelines for Vegetable Crops

Onions

Onion Sowing for Success

Peas

Peppers

Potato Planting Instructions by Frank Hodge

Potatoes

Saving Your Tomato Seeds

Seed Sowing 101 by Penn Parmenter. Colorado Gardener Educational Issue 2017 – Learn how to start seeds indoors. (Scroll to page 7 on the link.)

Spinach

Successional Planting Crop Optimization and Season Extension – Guidelines from renowned Boulder gardener Tracey Parrish on planting continuous vegetable crops throughout the season.

What Veggies to Plant When – Connect your planting times with the holidays!

Vegetable Planting Chart


POLLINATORS

Pollinator Guide

Audubon Plant List for Birds

Bird Attracting Plants

Flowers to Attract Butterflies and Hummingbirds

Plants for Various Pollinators

Plants to Support Honeybees & Wild Bees


PEST CONTROL

Deer & Rabbit Resistant Plants

Top Deer Resistant Plants for the Front Range

Releasing Ladybugs Instructions

BMSB in Orchard Crops

Spotted-wing Drosophila management in home plantings


DISEASE CONTROL

Ribes (Currants and Gooseberries) and White Pine Blister Rust


SOIL IMPROVEMENT

Planting Recipes

Cover Crops info from Botanical Interests


INSTRUCTIONS ON PLANT CARE

Vegetable Garden Care Recommendations

Garlic Planting, Feeding & Care

How to Care for Onion Starts

Clematis Pruning Groups

Viticella Clematis – Why Grow Them

Care of Ornamental Grasses

Late Season Gardening


BULBS

Amaryllis Growing Instructions

Forcing Narcissus

Tips on Indoor Planting for Paperwhites


WINTER CARE

Winter Damage on Evergreens

Winter Watering

sidebar

Page Sidebar

In This Section

  • Plant and Cultivation Information

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!

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

SUMMER HOURS
Tuesday-Sunday, 9AM-5PM

 

Footer

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!

Map

Our Hours

Seasonally, MARCH to OCTOBER.
MARCH HOURS:
Thursday-Sunday, 9AM-5PM

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

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

Mondays, CLOSED

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