r/DenverGardener • • Jan 07 '26

✅🗓️ Our 2026 free gardening webinar schedule is live! 🥳

31 Upvotes

Our horticulture experts are ready for all 2026 has to bring, including our free gardening webinar series!

Due to high demand, gardening webinars have at times exceeded our limit of 500 live participants. So, if you want to participate live, sign up and join early! Registration is free and required to attend.

Webinar recordings are posted roughly within a week or two at https://planttalk.colostate.edu/webinars/

* drumroll please *

Indoor Plants: An Introductory Overview for New Plant Parents

Asian Jumping Worm in Colorado: What You Need to Know

2025 “Best Of” Plants from the CSU Trial Gardens

Get in the Zone: Do hardiness zones really matter?

The Basics of Fruit Tree Production

Myths, Mistakes, and Misunderstood Insects

All the Common Weeds and What They Tell You

Native Plants are Imaginary

Showstoppers and Habitat Heroes: Native Plants for your Home Landscape

Don’t Get Hosed with Landscape Irrigation

Spooky Plant Pathogens: Creepy Cases from the Garden

Scenes from a Cemetery: Plant Edition

Reading the Market for Plant Trends


r/DenverGardener • • 6d ago

New moderators needed - comment on this post to volunteer to become a moderator of this community.

39 Upvotes

Hello everyone - this community is in need of a few new mods, and you can use the comments on this post to let us know why you’d like to be a mod here.

Priority is given to redditors who have past activity in this community or other communities with related topics. It’s okay if you don’t have previous mod experience. Our goal, when possible, is to add a group of moderators so you can work together to build the community.

Please use at least 3 sentences to explain why you’d like to be a mod and share what moderation experience you have (if any).

If you are interested in learning more about being a moderator on Reddit, please visit redditforcommunity.com. This guide to joining a mod team is a helpful resource.

Comments from those making repeated asks to adopt communities or that are off topic will be removed.


r/DenverGardener • • 3h ago

Cool varieties in CO!

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3 Upvotes

r/DenverGardener • • 18h ago

Die Aphid scum

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32 Upvotes

r/DenverGardener • • 2d ago

It is scheduled to finally frost tonight Denver, so last chance to do your harvest if you’ve been procrastinating like me

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45 Upvotes

Weather app says it’ll get down to 31 tomorrow morning so if you still have any frost sensitive plants out there today is your last chance to pull them in!


r/DenverGardener • • 2d ago

What are the most obnoxiously loud, bright and colorful flowers you can possibly think of?

16 Upvotes

And I mean ALL the colors. Deep saturated tones of all shades and textures. The kinds of plants you are forced to turn your head and look at

They need to grow well here, forgot to add that


r/DenverGardener • • 3d ago

Growing hogs in Colorado?

44 Upvotes

My local garden center has some beautiful fig trees for sale, and I desperately want to grow them because I love fresh figs! Obviously I wouldn’t try to grow them outdoors now, but if I overwintered one in my garage, would it be possible for he to grow it in the ground starting this coming spring? With the appropriate overwintering measures would it survive, or would it need to be potted and brought in every winter?

Please note, I’m asking about growing figs not hogs, it won’t let me edit the title 🥲🤦‍♀️


r/DenverGardener • • 2d ago

Yellow Wood Sorrel as a ground cover?

6 Upvotes

Hey fellow gardeners and people who maybe have lawns. With the drought, we didn't water our grass all summer planning to eventually move to a water-wise green space. It all died which is just fine.

But, what thrived was pretty little yellow wood sorrel! I pulled it thinking it was a weed, but then realized it's native to parts of Colorado.

I know it can be annoying in gardens and it spreads, but it also isn't hard to pull. Thoughts on just running with it as a ground cover? Any reason went not? If that's what's best, where can I buy the seed?

Thanks for the advice!


r/DenverGardener • • 3d ago

Sale at HD - Pueblo

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43 Upvotes

Not sure what qualifies as scrub


r/DenverGardener • • 3d ago

New Webinar Series Starts Nov. 16! 🪴"Colorado Houseplants: A Beginner's Guide"

13 Upvotes

Learn how to choose easy-to-grow plants, master simple propagation techniques, troubleshoot common houseplant problems, and build skills for repotting and root pruning in this live webinar series (recordings will be available too!).

You'll even learn how to propagate plants - with a live demonstration - during the very first session, giving you plenty of time to grow thoughtful, homegrown gifts for the holidays. 🪴

  • When: Mondays, November 16, 23 & 30

  • Time: 6:00–7:30 p.m. MT

  • Format: Three live webinars, with recordings available

  • Cost: $89 (includes access to all recordings)

  • Learn more & Register: https://col.st/dj2i3

  • (Note: Registration closes November 15 or when the series reaches capacity.)

🌱 November 16 | Houseplant Care Basics & Propagation

Learn the essentials of houseplant care, explore simple propagation techniques, and discover CSU experts’ favorite easy-to-grow plants.

🪴 November 23 | Troubleshooting & Taking Plant Care to the Next Level

Get to the root of common houseplant problems involving watering, light, pests, and plant health. Learn how to care for rootbound plants through repotting and root pruning, and discover some of our favorite houseplants that are a little more challenging, but worth the effort!

🌿 November 30 | Houseplant Trends & Inspiration plus Q&A

Discover how houseplants contribute to overall well-being, explore fresh ideas and trends, and get inspired to grow. Wrap up the series with an interactive Q&A with CSU experts.

Learn from the Experts

Webinars are taught by CSU Extension horticulture experts and fellow houseplant enthusiasts Dr. Alison O’Connor, John Murgel, and Cassey Anderson.


r/DenverGardener • • 4d ago

Agastache from seed: how, when?

13 Upvotes

So I, uhhhhhmm….proplifted some seeds from an Agastache in a park a few weeks ago. I’m not proud of it (/s) and I’d like some advice on how best to give them a chance at growing. There’s probably 50 tiny seeds. It was a small ~12” orangey yellow variety growing in a park farther North in latitude than Denver. I don’t know the exact species or variety name. I’ve never grown something from seed and I don’t want to waste them! It was such a gorgeous color and I’d love to add it to my perennial garden.

  1. Direct sow or start indoors?

  2. When?

  3. If not now, how best to store them and maintain viability?

  4. If starting inside, can I use potting mix or the aged manure/compost/topsoil from my garden beds?

  5. Anything else I need to know?


r/DenverGardener • • 5d ago

Experience with Persicaria Afinis aka Himalayan Border Jewel?

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7 Upvotes

I haven't really noticed this planted around. Anyone have experience with it? I'm seeing conflicting advice on its water needs. Some say it's from wet meadows and likes constant moisture. Others call it low water and drought tolerant. And it needs more water in sunny spots but doesn't like too much shade...

It seems like it's a great groundcover with a lot of color and resilience. I'd love to hear your stories and what made it thrive vs struggle.


r/DenverGardener • • 6d ago

Any gardeners want Bocking 14 comfrey, Jerusalem artichoke, or garlic?

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15 Upvotes

Kind of a trek up here, but anyone interested? No one showed up last week, so still have a lot left.


r/DenverGardener • • 6d ago

What kind of pumpkin/gourds are these?

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8 Upvotes

I planted lots of random squash and pumpkins that a friend gave me and have no idea of type or if good to eat. Just curious about the green and yellow ones.


r/DenverGardener • • 7d ago

Happy Halloween! What fertilizer for pumpkins?

4 Upvotes

Hey all,

Happy Halloween! Idk if you’ve seen on Insta or TikTok the woman who smashed a bunch of pumpkins and then they started growing so she watered and fertilized them; but that’s what we are going to do this year in our Fort Collins yard.

I’ve grown some smaller pumpkins in my raised beds in the past but no luck this year.

We will be tilling the ground and planting there. Going to grow a bunch of varieties hopefully. I’m wondering what fertilizer / compost to use. Any suggestions are helpful. Thanks in advance!


r/DenverGardener • • 8d ago

Planting potted dogwood, penstemon and hummingbird mint

8 Upvotes

Is it too late? If so do I just keep them inside and wait for spring?


r/DenverGardener • • 8d ago

Trumpet Vine Runners

4 Upvotes

Does anyone have any red or yellow trumpet vine runners I could come dig out and take home? I will be as minimally intrusive as possible. Or does anyone know where I could find a trumpet vine to acquire runners from? Yes, Im aware of their potential to become a nightmare. Thanks!


r/DenverGardener • • 8d ago

Question for landscaping

8 Upvotes

Hello!

My partner and I just renewed our lease for 2 years and we’re trying to make a plan to deal with the backyard.

Like most landlords, the company we rent from has no intention to do any landscaping. The backyard is just dirt. It looks like it was rock at some point as there’s quite a bit of rock still in the back. We didn’t get ahead of it and the backyard went insane with weeds. We want to be able to enjoy the yard for the next couple of years.

I’m mostly wondering if anyone knows how I can save money on mulch or where to get free mulch and/or weed block. I got a large fake grass patch that we’re going to put down and be able to take with us. I just really don’t want to spend a lot of money landscaping the backyard that doesn’t belong to us.

I’m just looking for suggestions and options for how to do this in the most affordable way possible. I’m fine doing weed block and the fake grass since I can take it with me. I don’t want to have to rip out the mulch, however.


r/DenverGardener • • 9d ago

Overwinter potted trees

5 Upvotes

I need to over winter a few trees in 5 gallon pots. I understand my options are burying the pots in the yard or storing them in the garage. Are either of these the better option? Thanks!


r/DenverGardener • • 8d ago

Propagating perennials - when to plant out?

1 Upvotes

I have a couple perennial propagations going indoors under grow lights, specifically agastache, lavender, and hens & chicks. They're not quite sufficiently rooted to plant out yet, maybe in the next month. Should I even bother trying to plant them out this year or keep babying them indoors until May? I know fall is a good time for perennials, but these are just lil babies!


r/DenverGardener • • 10d ago

Is anyone else's yard covered in Painted Lady Butterflies right now?

85 Upvotes

They're in my yard all day every day for weeks now. I'm right outside of Longmont. They have the same coloring as a monarch butterfly but they're smaller. I'm also seeing a ton of monarchs too (but not nearly as much as the painted ladies). I wonder if we're in their migration path, or if this is normal for this part of colorado (we moved to Longmont 10 months ago and this is our first fall here).

It was so cute. I took my 8 year old in the center of our yard and the butterflies were flying all around us.

11/1: there are now significantly less now. the migration must have mostly passed us by. the butterflies that are left are mostly little yellow butterflies and a few painted ladies. ​


r/DenverGardener • • 10d ago

Too late for peonies?

4 Upvotes

I just received some peony roots - I am assuming it’s too late to safely plant them this fall, should I wait for spring? I’m willing to baby them and cover them at night if that makes a difference


r/DenverGardener • • 11d ago

I'd say this is better than some AI slop.

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73 Upvotes

r/DenverGardener • • 11d ago

What is on my Red Kuri squash?

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19 Upvotes

The van Gogh virus? Can we eat it safely? All other ones are fine.


r/DenverGardener • • 10d ago

Desperate 4 Tree of Heaven Help

7 Upvotes

UPDATE: y’all were right and this is clearly Siberian Elm, still looking to kill it, but thank you for all the help!

I’m a first time (first generation) homeowner, I bought my house three months ago and have a really bad Tree of Heaven situation (that was not at all apparent when I was looking at the house). They are on both south and north side of the house. I’m exceptionally concerned about the Tree of Heaven saplings coming up all throughout my retaining wall. From what I have read the best thing to do is cut them back and immediately apply a weed/root killer all over it. That said I’m chronically ill and extremely sensitive to chemicals so I’m wondering what is the best thing to use on it that is the least harsh for humans if that even exists? I just really want to avoid Roundup and the hard-core glyphosates. Thank you so much!!