Overview
The average elevation in the state is above 6,800 feet; high intensity sunlight and generally low humidity, rapid and extreme weather fluctuations and diverse soil conditions all combine to challenge Colorado gardeners. We have the resources to help you be successful. Topics in this section include: Gardening Basics, Diseases, Flowers, Fruits & Vegetables, GardenNotes (Master Gardener Publications), Trees and Shrubs and Yard.
- Landscape for Life™
Teaches you how to harmonize with nature in your garden, regardless of your location—whether you’re tending a city or suburban lot, a 20-acre farm, or a shared space in your condominium. - Online Resources for Gardening and Landscape
Combines the following garden and landscape resources in one page: CSU Hort Blog, PlantTalkTM Colorado, Yard and Garden Fact Sheets, and Master Gardener GardenNotes. - Northern Colorado Bloom
Free guide for all things gardening in northern Colorado. - Hort Agents and Specialists Blog
Colorado gardening for everyone! Advice and Observations from your CSU Extension Horticulture Agents and Specialists. - CSU Annual Flower Trial Garden
The purpose of the trial program conducted at the Annual Flower Trial Garden is to evaluate the performance of different annual plant cultivars under our unique Rocky Mountain environmental conditions. Click here to see live webcams in the gardens. - Grow and Give Colorado Grow & Give was created to address food insecurity in Colorado by connecting backyard and community gardens to food donation sites across the state. Click here to access resources to help you both ‘Grow’ and ‘Give’ part of your garden’s bounty to those in need.
Publications
CSU Extension has several publications for the Colorado gardener. Topics in this section include:
- Gardening Basics
- Diseases
- Flowers
- Fruits & Vegetables
- GardenNotes (Master Gardener Publications)
- Insects
- Native Plants
- PlantTalk ColoradoTM
- Trees and Shrubs
- Yard
Gardening Basics
- Choosing a Soil Amendment (2/13)
- Colorado Mountain Gardening Basics (12/14)
- Container Gardens (8/20)
- Drip Irrigation for Home Gardens (7/14)
- Gardening for Newcomers (3/13)
- Growing Plants From Seed (11/18)
- Hidden Value of Landscapes: Implications for Drought Planning
- Homeowner’s Guide to Alternative Pesticide Management for the Lawn & Garden (7/18)
- Homeowner’s Guide to Fertilizing Your Lawn and Garden (7/18)
- Homeowner’s Guide to Pesticide Use Around the Home & Garden (7/18)
- Home Sprinkler Systems: Operating and Maintaining (5/20)
- How to be Successful at a Farmers’ Market (6/19)
- How to Submit Samples to a CSU Extension Plant Diagnostic Clinic (8/20)
- Landscaping for Energy Conservation (11/18)
- Mulches for Home Grounds (12/20)
- Watering a Home Landscape During Drought (4/13)
- Watering in Fall and Winter (3/13)
- Xeriscaping: Creative Landscaping (3/19)
- Xeriscaping: Retrofit Your Yard (10/20)
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Plant Diseases
- Ascochyta Leaf Blight of Turf (6/12)
- Aspen and Poplar Leaf Spots (12/13)
- Bacterial Wetwood (12/13)
- Cytospora Canker (12/13)
- Environmental Disorders of Woody Plants (8/20)
- Fire Blight in Ornamental Trees and Shrubs (Revised 5/24) 2.907
- Greenhouse Plant Viruses (TSWV/INSV) (12/14)
- Healthy Roots and Healthy Trees (12/13)
- Honeylocust Diseases (12/13)
- Leaf Scorch (12/14)
- Magnesium Chloride Toxicity in Trees (12/14)
- Mistletoes in Colorado Conifer (12/13)
- Necrotic Ringspot of Kentucky Bluegrass (4/15)
- Nonchemical Disease Control (5/13)
- Pine Wilt Disease (2/14)
- Pinyon Pine Diseases and Insects (12/14)
- Powdery Mildews (5/13)
- Recognizing Tomato Problems (5/13)
- Strawberry Diseases (2/21)
- Sycamore Anthracnose (12/14)
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Flowers
- Creating Pollinator Habitat (1/18)
- Edible Flowers (10/20)
- Fall-Planted Bulbs and Corms (10/09)
- Growing Lavender in Colorado (10/09)
- Growing Penstemons (2/21)
- Herbaceous Perennials (1/20)
- Mountain Flowers (9/13)
- Native Herbaceous Perennials for Colorado Landscapes (4/14)
- Perennial Gardening (1/20)
- Poinsettias (11/09)
- Rock Garden Plants (7/11)
- Roses – Selecting and Planting (9/20)
- Spring-Planted Bulbs, Corms and Roots (10/09)
- Wildflowers in Colorado (12/20)
- Xeriscaping: Perennials and Annual Flowers (2/10)
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Fruits and vegetables
- 2019 Larimer County Master Gardener Tomato Trial
- 2020 Larimer County Tomato Information/Transplant Availability
- Apples and Pears in the Backyard (11/14)
- Cucumbers, Pumpkins, Squash and Melons (11/20)
- Currants, Gooseberries and Jostaberries (1/17)
- Fertilizing Fruit Trees (12/14)
- Fertilizing the Vegetable Garden (5/14)
- Grape Varieties for Cold Areas of Colorado
- Peppers and Eggplant (11/20)
- Pollination of Tree Fruits (10/09)
- Potatoes in the Home Garden (10/18)
- Preparation of Small Spray Quantities of Pesticides (10/20)
- Raspberries for the Home Garden (4/20)
- Saving Seed (9/13)
- Stone Fruits in the Backyard (5/16)
- Storing Vegetable and Flower Seeds (5/20)
- Strawberries for the Home Garden (1/21)
- Training and Pruning Fruit Trees (9/09)
- Vegetable Gardening in the Mountains (12/20)
- Vegetable Gardening – Nitrogen Recommendations (8/20)
- Vegetables – Storing Home-grown (7/15)
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Native Plants
- Native Grasses for Colorado Landscapes (8/12)
- Native Plant Guides
- Native Plant Reference List (8/12)
- Native Plant Vendors (4/12)
- Native Herbaceous Perennials for Colorado Landscapes (4/14)
- Native Trees for Colorado Landscapes (7/08)
- Native Shrubs for Colorado Landscapes (1/18)
Trees & Shrubs
- Columnar and Fastigiate Trees for CO Landscapes (9/20)
- Deciduous Shrubs (4/23)
- Deciduous Trees: Large (10/17)
- Deciduous Trees: Small (9/17)
- Evaluating Tree Fruit Bud & Fruit Damage from Cold (8/10)
- Evergreen Shrubs (12/17)
- Evergreen Trees (10/20)
- Flowering Crabapple Trees (2/08)
- Front Range Tree Recommendation List (3/14)
- Hedges 5/20)
- Lilac/Ash Borer: A Common Wood Borer of Colorado’s Street Trees (5/14)
- Magnesium Chloride Toxicity in Trees (12/14)
- Mountain Areas Trees and Shrubs (4/18)
- Native Shrubs for Colorado Landscapes (7/08)
- Native Trees for Colorado Landscapes (7/08)
- Pollination of Tree Fruits (10/09)
- Protecting Trees During Construction (8/20)
- Salt Tolerance of Common Landscape Trees of the Colorado Front Range (11/23)
- Training and Pruning Fruit Trees (9/09)
- Xeriscaping: Trees and Shrubs (12/16)
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Yard
- Buffalograss Lawns (10/14)
- Composting Yard Waste (8/20)
- Diagnosing Brown Spots in the Lawn with an Irrigation Audit (7/20)
- Ground Cover Plants (1/18)
- Ground Covers and Rock Garden Plants for Mountain Communities (10/20)
- Home Sprinkler Systems: Backflow Prevention Devices (10/14)
- Home Sprinkler Systems: Operating and Maintaining (5/20)
- Home Sprinkler Systems: Preparing Your Sprinkler System for Winter (10/14)
- Irrigation: Inspecting and Correcting Turf Irrigation System Problems (10/14)
- Lawns: Control of Annual Grassy Weeds (12/14)
- Lawns: Home Lawn Renovation (3/14)
- Lawns: Lawn Care (3/12)
- Lawns: Growing Turf on Salt-Affected Sites (12/13)
- Lawns: Watering Established Lawns (11/14)
- Low Flammability Landscape Plants (4/23)
- Ornamental Grasses (10/11)
- Sustainable Landscaping (10/11)
- Watering a Home Landscape During Drought (4/13)
- Watering in Fall and Winter (3/13)
- Xeriscaping: Ground Cover Plants (6/20)
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News
News
- Plant Trees to Prepare for Emerald Ash Borer, Increase Diversity
Associated Landscape Contractors of Colorado
Hot Topics
 Gardening with Inmates A pilot project with the Yuma County Jails is combining inmates and gardening this summer. Learn more |
 Commercial Pesticide Applicators Commercial Pesticide Applicators Exams Prep Course, offered in Lakewood, in conjunction with CSU Extension agents. Learn more |
 Japanese Beetle Japanese beetle adults chew flower blossoms and leaves of many commonly grown plants. Learn more |
 Ascochyta Leaf Blight of Turf Ascochyta leaf blight has become a common problem on Kentucky bluegrass lawns in Colorado. Learn more |
 Aspen and Poplar Leaf Spots To reduce future disease problems, rake up and dispose of leaves and prune out branches with cankers. Learn more |
 Recognizing Tomato Problems To manage pests, identify the source of the problem by assessing the symptoms. Learn more |
Programs
Yard and Garden Feature Programs
 Colorado Master Gardener Program CSU Extension volunteers trained in horticulture and work out of the local county extension office. Learn more |
 Native Plant Master Want to learn more about the plants that grow in nature? Take a Native Plant Master class and get to know the native plants of Colorado. Learn more |
 Lawncheck Lawncheck is an on-site, lawn consultation service for a fee. If interested, click “Book a Visit.” Learn more |
 Lawn Irrigation Self Assessment Audit Colorado State University Extension developed the LISA toolkit for homeowners to take action against irrigation practices Learn more |
 Planttalk™ Reliable, timely information on more than 500 horticultural topics, in English and Spanish. Learn more |
 Certified Gardener Badging Program Available Online The Certified Gardener online program is flexible and allows you to earn badges. Take individual courses or bundle them. Learn more |
 Plant Select® Plants chosen for their beauty, resilience, low maintenance and suitability to the Rocky Mountain region. Learn more |
Websites
CSU-affiliated sites
- Blooming Color by Season
- Blueprints and Housing Equipment Plans
- Colorado Master Gardener Program
- Colorado Plant Database
- Colorado Water Center
- CSU Herbarium
- Drought Resources
- Fire Resources
- Flood Resources
- Flower Trial Garden
- Grape Grower’s Guide
- Landscape for Life™
- Lawncheck
- Lawn Irrigation Self Audit (LISA)
- Native Plant Master® Program
- Plant Diagnostic Clinic
- Plant Select®
- Planttalk Colorado™
- Poisonous Plants Guide
- Soil, Water and Plant Testing Lab
- Grow and Give Colorado
- Thousand Cankers Disease
- Turfgrass Resources
- Weed Science Information
