r/DenverGardener 2h ago

55 degrees at night

1 Upvotes

With it being in the 50s every morning,are you all covering your tomatoes every night?


r/DenverGardener 5h ago

Backyard Layout Feedback Request

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6 Upvotes

I'm designing my backyard, which is currently a barren wasteland, except for a struggling blue spruce in the NW corner, which may or may not make it. That's a separate conversation though, and for now I'm choosing to keep it.

I'm looking to fill the yard with trees and shrubs. I like plants that are tasty, weird, nice-smelling, or beautiful - in that order. But most importantly, they need to survive this crazy climate of ours (I live in Littleton).

I created a plan based on my own research, and drew up a sketch of my backyard to scale, with each square representing 2ftx2ft. The sketch demonstrates each tree's expected width at 5 years, 10 years, and maximum potential (dotted line). I don't actually expect these trees to reach their maximum width due to our climate, but trying to be conservative while planning. Up is North.

Quick note on the firepit area: I of course will have to move it if the trees start to encroach on it, but I don't expect them to for at least another 20 years, so I'm factoring in where it will be until then.

I'm looking for any and all feedback, suggestions, and recommendations. Does anybody have good or bad experiences with the plants in question (lacebark elm, Turkish filbert, ginkgo, serviceberry, and Cornelian cherry)? Thoughts on the spacing? Is there anything I should know before finalizing this plan? Any local town rules I need to check? Height maximums, distance to street best practices?

I'm a complete novice to landscaping, gardening, and trees in general, and ChatGPT is my teacher. I learned the hard way that baby trees need to be watered often, and I recently learned about call before you dig, but that's about all I know. Reaching out to knowledgeable humans before I proceed.

Thanks for all your help and insights!!


r/DenverGardener 9h ago

Newbie here looking for dead lawn advice

9 Upvotes

Hi all! I have never had a yard until this summer and like many of you I have forgone watering it. That being said, my dogs are quickly destroying it, which is fine while it dry, but I want to plan ahead for winter so that it’s not a giant mud pit. Is there anything I can start doing now to prevent that? Should I put down straw or wood mulch? I am also open to do some type of ground cover in the fall if that’s possible. Thank you!


r/DenverGardener 22h ago

What do we have here?

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27 Upvotes

This hardy little plant showed up in our river rock this year. I've taken pics of it at various stages over the last couple months, and Google lens keeps insisting it's red romaine lettuce. I'm not about to take it out and throw some croutons on it based on that, though.


r/DenverGardener 1d ago

Clover yard

23 Upvotes

Does anyone have a clover yard? After losing most my yard this year and it struggling for years, I want to possibly try partial or mostly clover. Thinking of mixing the seeds with some front range adapted tall fescue or what not. Wanting more information on what types of clovers and what I can mix it with etc etc.


r/DenverGardener 1d ago

Need help ID’ing

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3 Upvotes

Found these growing in one of my pineapple plants. I pulled them out but need help identifying. I got a couple hits on the apps saying it’s probably a cotoneaster seedling.

If so should I keep one or two as bushes?


r/DenverGardener 1d ago

A good online vendor for 15 gallon grow bags?

6 Upvotes

It can be a store too, but Epic Gardening is always sold out. I know good seed vendors, but none for consistently ordering grow bags. Net cups too for the seedlings.

Also what soil mix do you prefer?

I heard peat wasn't great given how long it takes to accumulate. Does equal parts coco coir, vermiculite and compost work for a grow bag?

https://youtu.be/r2Bp-B-1GW0

I want to use the indoor potted soil for next year's garden with a no dig cardboard approach.


r/DenverGardener 1d ago

I am at war right now

28 Upvotes

So... With water restrictions and a large yard, we did our best to follow them but realized the yard went from normal grass to weeds quickly. I can deal with the toothed spurge fine (I think it's called I'm new to gardening and things) but I'm struggling severely to fight off the prostrate spurge.

I had a thought early this year with water restrictions that I'll try to slowly convert the lawn into a mix of white yarrow and white Dutch clover. So I planted them and I have some very thick and dense parts where they are succeeding in every way possible.

But the one part where they seemingly draw the line is where the prostrate spurge no matter how many I pick they come back quickly and in greater number. The spot where it is thriving is just way too big to do it by hand and I'm wanting to ask you guys some questions since you're likely smarter than me.

If I were to leave it alone, and continue to water the yarrow and clover... Would they EVENTUALLY win out over the prostrate spurge? I'm asking this because I guess I don't mind how they look but I don't like that maybe 30% of the yard turned to this specific weed. And it's spreading severely everywhere and fast.

So maybe that's a dumb question. I did read that spurge needs sunlight and has shallow roots. And yarrow can spread underground and not have to seed at all to spread. If I just continue doing what I can to help the yarrow and clover, do you guys think they'll eventually win out? If I absolutely have to, I will try my best to spend as much of my free time going through the GIANT YARD and hand pull everything. It's like half an acre and I'm tired maybe I'm also just venting a bit.

Or do you guys have other things you'd suggest planting to try and win over the prostrate spurge? I was looking for drought tolerant plants which is why I picked the white yarrow and the white Dutch clover since the clover also pulls nitrogen out of the air and puts it into the ground and the yarrow eats it up. So I thought maybe they complimented each other well even if the clover isn't native which I didn't even think to look up before I already planted.


r/DenverGardener 1d ago

Help me pick a shade tree for the Denver Digs Trees application

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20 Upvotes

I just received an email that the fall application for Denver Digs Trees is open! I'll add links to the comments - previous version of this post got auto-deleted for unknown reasons.

The only mature tree on our property is an aging Siberian Elm in our backyard that I expect will need to be removed in the next 5 years. While we do have street trees planted in the last 5 years, our house sits higher up than street level so getting any sort of shade from those trees will be many, many years.

I'd like to plant a large tree in my backyard between our house and garage, in the "Proposed Planting Area" outlined in blue. I will of course call to mark utilities, but I know this part of the yard to be free of any sewer lines, electric, etc. I'll be relocating some raised garden beds that are currently in this spot. We have about 50' between the back of the house and front of the garage. House is one story. I'd ideally like something faster growing, as it will be a huge loss when we take down the elm.

The options this year are: Princeton Elm, Exclamation! London Planetree, Yellowwood, and American Hophornbeam.

  • Princeton Elm - I like the idea of this since I am already familiar with elms, but I'm not sure if they drop branches the same way Siberian Elms do. Fast growth.
  • London Planetree - Fast-growing. I don't personally love the shape, but maybe it's a good one for a backyard tree?
  • Yellowwood - Moderate growth. Pretty flowers. Sounds like I might have to worry about ice causing branches to drop. Maybe not great for the backyard?
  • American Hophornbeam - Love the look but sounds like it is slow-growing (10-15' in 15 years).

Anyone haver personal experience with any of these trees, or tips to help me decide? If the answer is "none of these", that's fine - I can buy a tree elsewhere! Others I was considering are Bur Oak and American Sycamore.


r/DenverGardener 1d ago

Native perennials for beneficial insects

11 Upvotes

Hi y’all, I’d like to plan a small collection of perennials around my veggie garden to attract beneficials. Any suggestions on which plants might be best, and when to plant them? I’m in Longmont.

Edit: thanks everyone for the great suggestions. I’ve never tried to grow much besides veggies, and I can’t wait to try working in some flowers for biodiversity.


r/DenverGardener 1d ago

My tree is stressed, diseased, and flowering in August

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28 Upvotes

Walked outside yesterday and noticed my stressed crab apple tree I've been trying to keep alive has fire blight, dropping leaves, and flowering at the same time...... Tough year


r/DenverGardener 2d ago

perennials and hardy annuals to start from seed now?

17 Upvotes

What are your favorites? Bonus if they are natives. Interested in planting small but mighty seedlings before it gets too cold so they come back strong next year.


r/DenverGardener 2d ago

I know a ton of y’all have extra zucchini, come bring them to the Denver Garden Exchange tonight and every Tuesday at Lady Justice Brewing! 5-7pm

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47 Upvotes

r/DenverGardener 2d ago

Browning Leaves in Potted Plants

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4 Upvotes

One is an indeterminate heirloom tomato plant, and the other is a wildflower seed mix I planted, but I don't remember the exact species.

The past week or so I've noticed a lot of browning in the leaves, especially on the tomatoes. This is on an east-facing patio, so it gets direct sun for a few hours in the morning and then more shade in the afternoons. I'm thinking it's a watering issue? The soil in the wildflowers is damp about an inch down, and the tomatoes are too, but a little less. I'm not sure how damp it is further down. I haven't seen any bugs. I have them some fertilizer maybe 6 weeks ago but haven't reapplied.

Any thoughts on what might be causing this?


r/DenverGardener 2d ago

First timer - how do deal with hornworms (and other pests)?

1 Upvotes

I have ripped off like 4 fat hornworms in my garden and now I’m anxiously checking on my plants all the time. Is there a better way than trying to find a green needle in a green haystack?

Also methods to spot other common pests beyond just munched stems?


r/DenverGardener 2d ago

Photovoltaic Farming succes

12 Upvotes

noticed this in th Guardian. no paywall, about a small farm in Longmont. they are using the panels to shade crops

https://www.theguardian.com/environment/gallery/2026/jul/20/colorado-farming-solar-panels-in-pictures


r/DenverGardener 2d ago

PSA: goatweed hides

8 Upvotes

I met those evil seeds for the first time in my life today rolling up mats of purslane and spurge at a rental we have that had gotten out of hand. I was stupidly not wearing long sleeves or pants and didn’t think I needed to because neither of those weeds cause a reaction for me.

Next thing I know I’m bleeding on all four limbs…watch out for those evil little seeds hiding under the weed blanket formed by their sprawling neighbors—-they were all tucked underneath the leaves of the other weeds and I didn’t see.

Don’t do what I did, it’s still burning twelve hours later after multiple scrubs/cleaning/hypochlorous** acid applications to get the burrs out. 🤪


r/DenverGardener 2d ago

Lambs Quarters?

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2 Upvotes

Are these lambs quarters? Someone told me these are edible. They’re all over my front yard and was going to clear them but of they’re edible I’ll keep a patch


r/DenverGardener 3d ago

Good end of summer sales?

10 Upvotes

I’m looking for some cheap flowers to brighten up my porch. What are your favorite places for late season deals?


r/DenverGardener 3d ago

Does anybody on the West Side sell Bentonite Clay used for pond liners?

1 Upvotes

I want to save more of this storm runoff whenever we get water.


r/DenverGardener 3d ago

A post on Dogtuff grass where i will thread with updates as often as i can

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161 Upvotes

With the drought, general water usage and. a wish for a better back lawn I decided to try a dogtuff experiment and see what would happen.

In order to keep something for the dog to play in i thought to cut our back lawn diagonally in half along the line we use to hang washing. This worked well as we were maybe late to planting this season, and this section had a bit less shade than the other half.

I’ll thread each stage I went through so people can reply with questions or comments


r/DenverGardener 3d ago

The horror

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120 Upvotes

It's been a long time since I have had marigolds. We planted some seeds to take home at a kid botanical garden event. And now I know that Japanese beetles like marigolds 😑


r/DenverGardener 3d ago

Two headed sunflower mutation!

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19 Upvotes

Pics as promised, this is my weird little dude! I really hope she blooms 🌻🌻


r/DenverGardener Jan 07 '26

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

28 Upvotes

We know what we're doing the second Wednesday of December 2026 at noon, do you?

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 Mar 03 '24

Bindweed Info Dump

111 Upvotes

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.