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Call 303-730-1920 or email Master Gardener volunteers with your lawn, landscape and garden questions. Visit any of our demonstration gardens and chat with a master gardener volunteer.

Become a Master Gardener Volunteer


Apply to be a Colorado Master Gardener today! Applications to become a 2023 volunteer are open statewide through October 16th. Click here to learn more.

Expand Your Knowledge and Skills


CSU Extension hosts many in-person and online educational events. Check them out here and here.


September 10 @ 9:00am-1:00pm

17 Mile House Farm Park

Info Booth: Heirloom and Native Plants

No registration required.


September 14 @ 12:00pm

Fruit Trees for the Front Range

Register here.


September 20 @ 6:00pm

Bemis Public Library Monthly CMG Series: Common Plant Diseases

No registration required.


October 12 @ 12:00pm

Great Plants for Fall Color

Register here.


October 18 @ 6:00pm

Bemis Public Library Monthly CMG Series:

Fall Planted Bulbs

No registration required.


November 9 @ 12:00pm

A Gardening Year-In-Review

Register here.

May The Gourds Be With You

By Donnetta Wilhelm, Colorado Master Gardener

The Cucurbitaceae family of plants features about 975 species of food and ornamental plants, which includes cucumbers, gourds, melons, squashes, and pumpkins. It is one of the largest plant families used as food for human consumption. Three standouts of this plant family: it boasts some of the biggest fruits and vegetables in world, the plants have many interesting characteristics, and this plant family offers a variety of uses other than just human consumption.

 

Grow Big

The Guinness Book of World Records lists the largest pumpkin in the world weighed just above 2,702 pounds in Italy in 2021. The longest bottle gourd, known as calabash, measured 12.5 feet long in Canada in 2015. The longest cucumber on record is 42.1 inches in 2011 in the United Kingdom. Not to be outdone by other countries, the heaviest butternut squash weighed 65.5 pounds in 2021 in Rhode Island.

 

Interesting Characteristics

Cucurbitaceae plants are monoecious, meaning they have both separate male and female flowers. While only the female flowers produce fruit, they need the male flowers to accomplish this task. Plants in this family are mostly prostrate or herbaceous annuals and are native to the tropics and subtropic regions. When grown in Colorado, they are warm weather lovers, need full sun, and for best production, plenty of water as the fruits begin to develop.

Squash bee (Xenoglossa) by natural history of grove county CA

Bumblebees and squash bees (Peponapis and Xenoglossa) are the best pollinators of pumpkins and squash since they forage in the morning. Squash bees have a life cycle that is perfectly timed with the life cycles of cucurbits. These bees have very fuzzy bodies that accumulate substantial amounts of pollen. Three genera, Cucumis (cucumbers, melons), Cucurbita (pumpkins, squash), and Citrullus (watermelons), rank among the top 10 in economic importance among the edible crops of the world.

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Volunteer Spotlight: Kathi Thistlethwaite

Colorado Master Gardener℠ (CMG) volunteers are a dedicated group of individuals who are knowledgeable and passionate about sharing gardening, landscape and horticulture education. This month we are highlighting Kathi Thistlethwaite.

When did you join the Colorado Master Gardener program and why did you join?


2018 – Joining CMG was a gift I gave myself after retiring from the financial industry. I also have a very supportive husband.


What is your favorite Master Gardener activity and why?

 

Functioning as one of the team leads at Hudson Gardens Vegetable Garden. It’s such a beautiful garden and the donation of our produce to Integrated Family Community Services is as rewarding an experience as I have known. Meeting the CMGs and apprentices who volunteer with us has been such fun! We work hard together and are passionate about what we do.

Read more about Kathi

Youth Programming and Collaboration at its Finest

By Dawn Fradkin, Arapahoe County Master Gardener Coordinator and Assistant Horticulturist

4-H Outreach Programs Supervisor Claudia Meeks with Clayton students

In early 2022, Clayton Elementary School in Englewood contacted the 4-H Outreach Programs Supervisor, Claudia Meeks. The school was interested in having a gardening club program to integrate its school and community garden into its after-school programs. Claudia reached out to the Colorado Master Gardener (CMG) Program knowing that the CMGs were already involved in the Clayton Garden and had some youth classes already developed. Within a few weeks Kris Nelson, one of the master gardener team leaders at the Clayton Garden, helped Claudia develop a new pilot program for this 4-H youth outreach request.

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Get a Jump Start on Next Spring

By Judy Kunz, Colorado Master Gardener

Photo: Better Homes and Gardens

Spring and summer blooming herbaceous perennials can be rejuvenated by dividing them in the fall. Most perennials will benefit from being divided every three to five years if they are overgrown, have become bare in the center, have sparse leaf growth near the bottom or are not flowering to their potential. Plants that are over-crowded are easy targets for disease, and dividing them allows for more air circulation, resulting in healthier, more vigorous plants and bigger blooms. Don’t wait until a plant is declining or under stress to divide it.

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Meet the New Arapahoe County

CSU Extension Director

Photo: Dina Baker and her dogs

Arapahoe County Open Spaces is thrilled to announce the appointment of new CSU Extension Director Dina Baker, following a four-month extensive search. Dina began her new position at the County on August 8.


Dina will head the Arapahoe County CSU Extension division, overseeing nine staff members, and will be responsible for managing volunteer committees, serving as liaison between CSU Extension leadership and Arapahoe County, providing overall leadership on priority educational programming based on community needs and being the public face of Arapahoe County CSU Extension. Her greatest passion is connecting children and adults of all ages to nature and being able to provide educational opportunities to diverse audiences.

Read more about Dina
From the Hort Desk

A Trip to the Lavender Farm

I traveled to the State of Washington last week to visit Olympic National Park and drove through Sequim, WA (pronounced “Squim”). Located along the northern coast of the Olympic Peninsula, this town is famous for the Sequim Lavender Experience, an agritourist co-op of small, family-owned lavender farms.

Lavender fields in Sequim, WA, Photo: Lisa Mason

Lisa Mason
CSU Extension Horticulture Agent
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What's in Your Garden? - Enjoying Fall Color

By Kathi Thistlethwaite, Colorado Master Gardener

Despite autumn ushering in shorter days and cooler temperatures, gardens can still be drenched in vivid colors and multi-seasonal interest.


One cultivar to consider adding to the garden is Fireworks Goldenrod (Solidago rugosa), which comes to life in late summer. Its fronds blossom and turn a vibrant shade of yellow, resembling exploding fireworks. It should be planted in full sun and will tolerate partial shade and varying levels of moisture.

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Fireworks Goldenrod, Photo: pinterest.com

Cover Crops to the Rescue

By Pam Rosendal, Colorado Master Gardener

Cover crop of peas in raised bed, Wilkes County Center, Photo: North Carolina Cooperative Extension

Colorado’s winter winds are brutal for our vegetable gardens; they carry away small particles of topsoil from the soil surface. Add to that the water erosion that washes away its share of topsoil. It’s enough to dishearten even the most experienced home gardener.

 

Cover crops protect the soil in a vegetable garden from wind and water erosion while, nearly simultaneously, suppressing weeds, fixing nitrogen, building soil structure, and reducing insect pests. Cover crops are vegetable garden superheroes!

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I Didn't Know That!

By Carol Gilmore, Colorado Master Gardener

Is it Poison Hemlock or Queen Anne’s Lace?


People have been asking, “Is this plant Poison Hemlock or Queen Anne’s Lace?” It’s a good thing to be aware of since all parts of the Poison Hemlock plant are poisonous and the roots of Queen Anne’s Lace are edible. They are both members of the carrot family. Both are found along waterways, roadways, and railroad tracks. Poison hemlock is on the Colorado Noxious Weed list (List C) whereas Queen Anne's Lace is non-native to the US.


Here’s how to tell the difference:

Photo: Pinterest/Andrian Tu

PHONE
(303) 730-1920

EMAIL
mastergardener@arapahoegov.com

LOCATION
6934 S. Lima St., Suite B
Centennial, CO 80112
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