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Annuals

Ask any recent newcomer to Colorado how it went when they tried to transplant their favorite flowers from back home. Colorado gardeners have learned to identify and adapt to the unique, varied climate conditions and growing seasons we find here in Colorado. Our hot summer days with intense high altitude sunlight and drying winds, combined with cool nights, can work to the gardener's advantage with proper planning.

At O'Toole's Garden Centers we have over 40 years of experience identifying the annuals that are perfectly suited for Colorado that will provide a dynamic blast of color to your garden this year. Here are just a few of the hundreds of annuals we carry at our 2 locations.


15% Off All Outdoor Plants

Valid through July 31

It's mid-summer and all our outdoor plants are on sale now at 15% off! Offer excludes houseplants.

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Gift Cards

Consider a gift card for birthdays, Mother's Day, or the Holidays. Shop together, plant together and watch together as your gift grows and blossoms into the future!

Tomatomania 2025

Welcome with Pat O’Toole Today’s the big day, Pat. That’s right, yes. TomatoMania. We’ve been waiting. Anticipating. How’s it going with checking people in? Great. We’ve already had, uh, several people for the winners from the, uh, early, early bird contest. So just finished putting the tomatoes out so they’re fresh off the truck ready to go? Today is TomatoMania, …

Tomatomania 2025 Photo Contest

Think you’ve got the ultimate tomato garden? Show us what you’re growing for a chance to win up to $300!

Cultivating Well-being with Houseplants

How do you escape the stress of today’s news and the artificial lights of your computer screen and smart phone?

Our customers say that gardening is part of their “me time”, and that it helps them feel hopeful and positive, the same can be said about caring for houseplants.

All Blog Entries
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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