Have a gardening question? We’ve got the answer! Contact Colorado Master Gardeners at Denver Botanic Gardens. They can also answer any plant-related questions and offer ornamental or cultivated plant identification.
Stop by the Gardening Help Desk in the Helen Fowler Library (free with Gardens admission):
- April – Oct.: Tuesday, Thursday and Saturday; Noon – 4 p.m.
- Nov. – March: Tuesday, Noon – 4 p.m.
For over 10 years Denver Botanic Gardens and Colorado State University (CSU) Extension Colorado Master Gardeners have collaborated to provide help to home gardeners. Colorado Master Gardeners tap into the knowledge of the Gardens and CSU Extension to provide sound scientific research-based horticulture information that is applicable to our diverse and sometimes challenging Colorado climate.
Pollinators are vital to the creation of many plant-based foods, beverages, medicines and fabrics. The Gardens strives to provide habitats for and information about important pollinators such as birds, bees, butterflies and other insects.
Make your garden welcoming for pollinators year-round!
- Plant early and late season flowers to provide food when fewer plants are in bloom. Pulsatilla (Pasqueflower), Phlox subulata (creeping phlox), Nepeta (catmint), Papaver (poppies) and Penstemon give early season sustenance. Late season food comes from Symphyotrichum (asters), Helenium (sneezeweed), Salvia and Solidago (goldenrod).
- Cut your garden back in spring. Native bees nest in dead limbs, branches and the hollows of the dried stems of flowering perennials. Leave some ground uncovered by weed barrier or mulch for ground-nesting bees.
- Provide essential water with bird baths, water features or simply a bowl out in the open.
- Reduce or eliminate your use of chemicals— even organic treatments can harm pollinators.
Bees swarm in the spring. In Colorado, bees swarm from approximately April 1 until the end of the summer with May and June being the busiest months. Here are some resources to assist you with relocating swarms of bees:
- Colorado Beekeepers Association swarm information and hotline
- Denver Bee swarm information and call list
- To Bee or Not to Bee hotline: 303-728-4422
Alert From the Experts
The emerald ash borer (Agrilus planipennis) has been confirmed in Colorado. This invasive Asian beetle has decimated ash trees in the Midwest since its discovery in 2002, costing millions of dollars to homeowners and cities. Early detection is key to controlling the emerald ash borer! Look for signs of infestation and report them to your county extension office.
Denver Parks & Recreation has started a campaign called “Be A Smart Ash.” Spend some time on their website and learn how you can help protect your ash and our urban canopy by identifying, treating and replacing Denver’s ash trees.
- Gardens Navigator — Locate and learn about thousands of plants from Denver Botanic Gardens' collections, learn more about the Gardens and its exhibitions, and create a personalized tour.
- Recommendations from the Helen Fowler Library — Specially selected websites providing information on a wide range of gardening, botanical and horticultural topics.
- Plant Select® — Plant names, color photos, growing tips and basic information for gardens from the high plains to the intermountain region.
- Planttalk® Colorado — Timely and reliable essays on all aspects of horticulture and gardening in Colorado. Find Xeriscape practices here.
- Plant Something Colorado — Inspiration and information from pros who know what it takes to grow a beautiful, bountiful landscape in Colorado.