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Putting the Color in Colorado!

2 Garden Centers In The Denver-Metro Area

O'Toole's Garden Center's mission is to cultivate beautiful gardens, happy employees and thriving communities. Visit O'Toole's for the plants, the products, and the expert advice you need to grow the garden of your dreams. O'Toole's is proud to be a local, family owned business with over 40 years of heritage. We offer high quality garden products at affordable prices, so everyone can enjoy spending time together outside with friends and family. Let's grow together!


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During fall bulb season, our shop is a lot like an ice cream parlor. Of course, we have everyone’s favorite flavors like grape hyacinths, bearded irisand tulips. These are the “Cookie Dough” of bulbs – always a treat! But every now and then, you might feel like a “Butter Pecan,” or heck, even a “Pistachio” for your fall garden. If...Read More
October 4, 2018
During fall bulb season, our shop is a lot like an ice cream parlor. Of course, we have everyone’s favorite flavors like grape hyacinths, bearded irisand tulips. These are the “Cookie Dough” of bulbs – always a treat! But every now and then, you might feel like a “Butter Pecan,” or heck, even a “Pistachio” for your fall garden. If ...

Featured Plant & Product

Chrysanthemum

Mums like the cooler weather of fall. They bud when nights start to get longer, and produce a multitude of blooms. These hardy perennials provide fall gardens with some much needed color just when summer flowers are fading.

Fall Preparations

O’Toole’s has a the supplies you need for fall prep! Rose Collars can help protect delicate rose grafts from winter freezing. Tree wrap defends young trees from sunscald. Frost blankets can protect tender plants from early freezes.

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40% Off All Trees & Shrubs

While Supplies Last

Fall is a great time to plant trees and shrubs, and we're putting all of our 2023 inventory on sale! Hurry in for the best selection and save big!

40% Off All Roses

While Supplies Last

If you've been thinking of adding roses to your garden, don't miss this opportunity to save big! All Roses are 40% off while supplies last!

40% Off All Monrovia Plants

While Supplies Last

Monrovia has been growing quality plants for nearly 100 years. Custom soil mixes ensure healthy roots and pruning/shaping helps them thrive. Save on all Monrovia plants this month!

30% Off All Pennington Grass Seed

Expires September 30, 2023

Pennington provides premium grass varieties for beautiful lawns, along with easy to use patch and repair mixes. Save on Pennington Grass Seed and help your lawn reach its full potential.

Chris Ibsen

Store Manager – Littleton

Over 30 years with O’Toole’s! A true gardening  expert! Email Chris Favorite plant: Evergreen

O'Toole's Staff
Apple Valley Greenhouse

Many of our annuals come from Apple Valley Greenhouse in Penrose Colorado. Apple Valley sources beautiful annuals from around the world and plants them in Colorado so they can deal with our unique climate. Video Tour!

2023 Garden Giveaway

Share the beauty of your garden and you could win a gift card valued up to $500!

How to Protect Your Plants from Late Freeze and Snow

Did you know that after May 2, there’s a still 50% chance of frost in Denver? Don’t let that stop you from getting your garden started now! O’Toole’s offers frost blankets and other products to help protect your plans from hard freezes. If you’re a vegetable gardener, we recommend this Insulated Plant Protector/Mini Greenhouse from Dalen. Tubes of water to insulate young …

Planting Winter Crops: A Guide to Growing Shallots, Onions, and Garlic

As the weather turns colder, many gardeners are ready to pack up their tools and wait until spring to start planting again. But why wait when you can start growing delicious winter crops? At O’Tools, you can find a variety of bulbs and plants perfect for winter gardening, including shallots, onions, and garlic. When planting shallots, it’s important to remember …

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2020 Garden Giveaway Winners!

September 18, 2020
It was so inspiring to see all the creativity and gardening passion out there! Check out the winners of our 2020 Garden Giveaway! Read Full Blog Entry…
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Ask a Gardener – Japanese Beetle
June 11, 2020
Japanese Beetles damage plants as both adults and larvae. Adults feed on soft leaf tissue, leaving skeletonized foliage. Larvae feed on roots, especially turf grass, leaving dead, brown patches in the lawn. Cech out this blog entry for tips and products to address both the larvae and the adult bugs. Read more