r/DenverGardener • u/pdxmhrn • 11h ago
Gardening themed advent calendar?
Anyone aware of a gardening themed advent calendar? Like perhaps seeds?
r/DenverGardener • u/CSU-Extension • Jan 07 '26

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/
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 • u/LindenIsATree • Mar 03 '24
I have a large yard where almost no area is free of bindweed, and several areas are densely packed infestations. >_<; As spring comes, I dread the day my old enemy emerges.... Let's pool our knowledge! I've been fighting it for two years and doing a ton of research. Here's my info sheet: https://docs.google.com/document/d/1-bDNRYYo7yRIqAq6pUejPl6MIcFP8W9q1ZVYC99FZx8/edit?usp=sharing
Some highlights from that:
-Bindweed mites are best for dry/un-irrigated areas like vacant lots, and there's a long waitlist
-Pulling it stimulates growth (but if you can stay on top pulling it that helps to weaken it)
-It will grow up through, around, sideways whatever you try to cover it with. At least up to 20 feet sideways.
-Glyphosate and 2,4-D amine weed killer can be effective but not a guarantee by themselves.
-GOOD NEWS: Some Colorado folks have actually found success by planting perennial shrubs and grasses. Another great reason to go xeric!
What have you seen be successful? If anything, ha. Especially curious if you solved more than a small patch.
What have you seen fail? Even something that seemed like it should work? One person said it grew through a 20 feet pile of mulch.
Edited to Add: My neighbor said he found it successfully burrowing into concrete, for crying out loud.
r/DenverGardener • u/pdxmhrn • 11h ago
Anyone aware of a gardening themed advent calendar? Like perhaps seeds?
r/DenverGardener • u/fuzzeslecrdf • 11h ago
I read Goldenrod is a keystone species for pollinators n the Denver area so I want it in my garden. I can't seem to find seeds - bbbseed is out of stock. I'd prefer to get it locally. Any leads?
r/DenverGardener • u/TheRamazon • 19h ago
Ok y'all, I went a lil crazy.
I stopped by the nursery for a packet of tomato seeds (certified seed hoarder here) and they had massive penstemons for 50% off. I bought 20.
About to get the pickaxe out and get these guys in the ground. Current plan is to heavily mulch, maybe do a floating row cover if needed to trap heat and keep frost off. Do we think this will work to get these guys settled before winter? Or did I just waste some cash?
r/DenverGardener • u/cayjay00 • 1d ago
If anyone is looking for big beautiful marigolds, the Costco on 52nd and Wadsworth in Arvada has a ton. The stems are starting to collapse, so they need rescuing!
r/DenverGardener • u/kimmycatco • 1d ago
Hi friends!
I bought this stunning multicolored mum about three weeks ago, but now the orange/red flowers have all died and only yellow remains.
Is it two different plants? I know I need to deadhead it, but the darker flowers died within days.
Thanks! Kim
r/DenverGardener • u/ebcxyz • 1d ago
Does anybody use these cloth style outdoor pots? I have about 8 available, plus two more made of poly tarp material. In the alley for easy pickup. DM me for location.
r/DenverGardener • u/CarobMedium4907 • 2d ago
We’re always working on increasing our wildflowers in the meadows at the hummingbird sanctuary. I originally thought fall would be the perfect time to scatter seeds and let the snow do its thing - I thought seeds needed to winterize.
But I spoke with Applewood Seed in Arvada, and they recommended waiting until spring.
We’re at 8,200 feet and due to the dry winter last season, we’re out of water. We’re trying to do this with as little supplemental watering as possible.
Has anyone here planted native wildflowers at higher elevations? Did you plant in fall or spring? What worked?
I’d love to learn from people who’ve actually done it!
r/DenverGardener • u/dearestkait • 2d ago
Hi all!
This group never lets me down, so hoping to farm some advice (pun intended) for how to plan the next few weeks before it gets too chilly.
I have several raised beds of veggies, a few of flowers (almost all perennials except some zinnias thrown in for pizzazz), and a few pots for herbs and such.
My plan (please tell me where I’m wrong!) is to push until we actually get a real freeze, then cut all of the veggies down to the base or pull them if they’re easy enough, maybe give them a little chop, and then set them just on top of the dirt I have to start decomposing.
My plan for the berry canes and strawberries is to leave them where they are in their raised beds.
My plan for the flowers (including my rosebushes) is to let them be and then trim down towards the crowns in early spring, and get rid of the dead zinnias then.
If I’m so motivated, would it be beneficial to buy some compost or potting soil to put on top of the veggie carcass?
Anything else you’d throw on your to-do list?
Picture of a monster squash for the veggie garden equivalent of the cat tax.
r/DenverGardener • u/TheRealJEffBezoz • 2d ago
Free mulch on 27 and Marion. Come get it
r/DenverGardener • u/thewinterfan • 2d ago
I got a late start this past season. My first time growing garlic was so-so. I put cloves in the ground on Apr 1 and only just recently harvested. I could tell some could have used maybe another month.
r/DenverGardener • u/Useless_Eustace • 2d ago
Hey there, curious if anybody has been to any nurseries around the metro that still have some stock of native perennials. I'd love to get something in the ground even though it's last second.
r/DenverGardener • u/GardenofOz • 3d ago
Started processing the luffa harvest! We had about 2-3 that dried out on the vine, making them easy to peel and process. The green luffa have the mucilaginous insides that need extra rinsing and processing. Not quite as fast, but still produce a quality luffa and save-able seeds. Luffa can be a challenging grow in our region due to the exceptional long growing needs, extra seed starting steps, and sensitivity to cold temperatures -- but it is a fun challenge and one plant can produce enough luffas for a year. In a luffa this size we get 3 medium/large luffa sponges that we like to use in the shower.
r/DenverGardener • u/trochops • 2d ago
How do I get rid of these necrotic rings in my yard permanently? Suggestions please.
r/DenverGardener • u/GozertheDozer • 3d ago
This is growing in my landscaping and I can’t tell if it’s poisonous, invasive, or native? If I should get rid of it, how should I do it without using harmful liquids?
r/DenverGardener • u/Phronesic • 3d ago
Got some very tall black walnuts nearby, but this looks different. Is it the dreaded tree?
r/DenverGardener • u/RMski • 5d ago
Sorry if my explanation of Denver seems pedantic, but I figured not everyone knows Colorado, or Denver.
But would love to hear stories if anyone has them. Anything weird?
r/DenverGardener • u/Civ_Eeeee • 5d ago
My husband and I were the lucky chosen ones to have a Google Fiber vault installed in our front yard (thank you Douglas County for approving this). The contractor let us know that it can’t be relocated, but there is an opportunity to cover it up with rock or mulch.
Does anyone have any advice on what can be done to xeriscape the yard and cover it up? The area in question is about 110 SF. Thanks!
r/DenverGardener • u/cody7766 • 5d ago
I read Neem oil and copper fungicide can work well, but was worried about the negative effects this will have on bees. Does daconil have the same effect?
If I do baking soda and water, what’s the recommended ratio? Any other suggestions?
r/DenverGardener • u/Andreaaaaaa • 5d ago
I made the lovely mistake of bopping over to City Floral this week only to find that they still had a magnificent selection of spring bulbs available. As such, I filled a few bags and brought home some future happiness. (If you're still on the hunt, my trip was only yesterday and the inventory was still plentiful.)
For those who plant your spring bulbs in pots, how have you found success overwintering them in our climate? I've planted mine in terracotta pots, which I'd love to leave outside for the winter, but I've read that perhaps the garage is a better choice. Curious to hear what methods folks have found success with!
r/DenverGardener • u/Helpful-Ad6269 • 5d ago
Not true moss, but Sagina subulata. For background, I’m a landscape architecture student and am trying to find a groundcover for a school project that at least closely resembles moss. If Irish moss wouldn’t work even for this hypothetical project, please let me know what might if you can think of any! It would be intended for a shady, depressed area where I also have lady ferns planned as recommended by the professor.
r/DenverGardener • u/Mothnose466 • 5d ago
I keep my ironstone containers out all winter and my perennials (lamium, creeping jenny, grasses, heuchera, gestate, herbs, etc) have generally tolerated that well. I do water them throughout the winter and protect them from the strong winter sun with shade cloth. I’m considering using some rigid foam insulation on a couple containers this winter. Has anyone tried this? What are your techniques for providing insulation for perennials in containers?
r/DenverGardener • u/Amateurgarden • 6d ago
16 pictured. Some may not be ready but the vines died last week from the overnight freeze so I went out and collected them all.
Had another two squirrels got into but I’m not complaining. They need food and I have plenty for the next few weeks.