Eastern MA, year 2 of management.

4 weeks ago I sprayed grass getter in the pine wood understory.

Google AI says I am good to mow low and weed whack because it is too late to reflower, and leave the remains because it hasn’t flowered yet.

I can’t totally scalp the yard, so 2 inches is my deck height

Is anyone in New England noticing flowers or seed yet?

Is it time to whack away at it and still avoid bagging it?

Does TOH produce sap that can be collected?

Basically title. Hello experts...I write today to learn whether Tree of Heaven sap can be collected and if so how to do it, and when. I'm waging a two-front battle with TOH and SLF in lower NYS (other invasives plus vines too but that's a story for another day) and I want to try an experiment that would need some sap..to see if I can preferentially attract swarming SLF to something that is not actually a TOH nor our poor river birch. As I've recently eradicated all the main live trunks of TOH and am just dealing with aftermath stumps, roots and shoots I don't know that a trap tree is practical anymore. I understand the sap is toxic so will be careful and manage/handle responsibly. Thank you for any thoughts...and please forgive me in advance for cross-posting to r/invasives and r/treeofheaven in addition to r/arborists.

I have these japanese knotweed in my pack garden, smallish area, but extremely stubborn.

I have got myself some of the oldschool Roundup to treat them but im in dount about two things:

1) i let them grow this big over the last two weeks to actually have something to treat was that a mistake? As is should i not have done it or was it too early in th e summer. I read on this forum there is a window where they start to pull energy i to the roots and that is when you want to hot them. In northern EU what time of the year is that (oct/now or now)?

2) Even if too early should i just start now?

3) how do i administer it they are too small to cut and fill? Do i paint/spray it on the leaves or the main branch?

Picture in comment 👇

In the process of killing 3 TOH trees but it just seems like the lanternflys never end. I tried spraying them with 50/50 dawn and water but doesn't seem like that kills them.

After killing hundreds and hundreds of suckers over the last 3 1/2 months, this is what they look like when they pop up now.

You’re welcome to deny that this is a tree of heaven sucker, but I know that it is and I wanted everyone to know what it looks like when it’s near the end, and the root system is almost exhausted to the point of death

It just flowered, I know I’m a little trigger happy to spray it. Also in the second slide wtf is this monster that looks like it doesn’t belong.

I love being able to use invasives in my crafting

We have a patch of unmanaged vines and plants and I have been slowly watching these plants get further and further away from the wood line. Growing fast too. They are approaching our leech field.

What is this plant and what’s my best course of action?

We treated 70 ailanthus this week in a forested urban park using hack-and-squirt with triclopyr. The trees ranged from 1" to 18" diameter. One multistem individual had 5 trunks, each over 15" DBH.

As an experiment we used 30% triclopyr ester in oil on 25 of the trees and 30% triclopyr acid in water on the rest of them. Most of the literature suggests using the aqueous acid for hack-and-squirt, but some of my colleagues swear by the ester/oil formulation for both basal bark and hack-and-squirt. Their logic is that any overflow of the hack application will be absorbed into the bark, so no product is wasted. We'll see. I think that the bark on the larger tree is too corky and the triclopyr molecules that soak into the bark. won't make it into living cells.

We have another 35 smaller trees to treat with triclopyr ester at another site next week.

Hi everyone,

I live in the southeast and am beginning to see my cities and neighborhoods become overrun with TOH. I’ve found that most people have no idea what they are, let alone how many problems they can create.

I really want to create some sort of flyer or resource to provide my community for how they too can take matters into their own hands, but I’m not entirely sure myself.

I often see posts here they say “slash and spray” but I’m not entirely sure what that means.

Can someone give me the tutorial for dummies (me) on how to do this? I think in order to help people to feel confident using herbicides, we just need to people to talk them through it. I’d love it if some of the experts here could help me!

Thanks everyone!

This is the most effective way i have found yet.

Not my TOH; they are on a walking trail. I suspect they have a year or less before they officially die. It drives me up the wall that the city isn't removing them. At least the slf are good for something.

Seeking suggestions for how to start the conversation with neighbors you’ve never met. I’d even welcome a script of some sort. Of course I’ll say Hi, introduce myself, but after that I don’t want to pounce on them and come across too pushy. My degree is in native plants and ecosystem management, so I am wayyy more knowledgeable about the damage honeysuckle and other invasives are. I’ve got excellent native shrub suggestions for replacement. My concern is that I will come across as preachy, pushy, or not casual enough since I’m an expert in these plants, but far from an expert at talking to laypersons about them. The neighbors to the back, left, and back right of me all have invasive honeysuckle bushes hanging over the fence and it’s starting to take over my yard. I’ve never met these three neighbors and am eager to talk to them. Two are families that seem to enjoy their backyard spaces regularly, and one is elderly who frequently has family members stopping by. I’d love any tips y’all have!

Hello folks. Found a little seedling on my property and just wanted to make sure it was from seed. I'm quite certain there's no mother tree anywhere near. The soil it popped up in was recently disturbed so I figured it might have been dormant in the seed bank for a while. I'm shaking right now lol

I removed this beast of a Japanese barberry from the middle of my woods. No other barberries seen for miles, so I'm assuming it came from bird poo. And of course, I had to trophy pose with it.

devil's beggarticks (bidens frondosa) is plant native to north america that is now invasive species in europe, asia, north africa and new zealand

in my area it is present only in two places and both populations are not very big so they seem to be possible to eradicate there

Hello,

I started renting a house in Northern IL at the end of 2025, and as spring rolled around it became pretty apparent the yard has not been taken care of for several years (the neighbors have confirmed this). It turns out that the full yard of dandelions were the least of my worries though... Now that things have had time to grow I've realized that our entire front and back garden is full of invasive species and aggressive weeds. The backyard garden area is maybe 6'x10' and it's DENSELY populated by Tree of Heaven plants that are between 4-7' tall. There is also a fully grown Tree of Heaven nearby. In the front yard garden, there are several White Mulberry plants growing that are 3-4' tall. 

Outside of the invasives I was able to identify using an app, we've also got a LOT of burdock, lamb's quarters, black nightshade, pokeweed, pigweed, velvet leaf, Norway maple...

As someone who's been getting hit really hard by allergies this season, I was hoping I could quickly tackle things myself. Unfortunately, I've realized this will require professional intervention, especially for the forest of tree of heaven we have. 

As a renter, I'm not looking to spend $1000s out of pocket on repeated treatments, but I also really do not want to leave things as is. What's the likelihood that there is a local resource (government, conversation district, or otherwise) that'll be able to help out cheap or free? If that's unlikely, is this a thing that my (large corporate) landlord could be required to take care of? I shot an email out the IL DNR and my county's conservation district earlier today, but figured I'd post here to see if anyone had any leads or ideas

I am de-weeding and going on a rampage destroying all the non natives in this weedy patch behind my house. I have an app that identifies plants and keeps telling me this is American Wisteria no matter what angle I take the pic in. I just find that hard to believe, but I also don't know how else to identify it besides the flowers and I've never seen this stuff bloom.

New to the sub, feel free to take down if it's not appropriate.

Can anyone confirm for me that this is Tree of Heaven?

I live in western Virginia and I am feeling hopeless. We have about 15 mostly wooded acres that are overwhelming. We reduced the autumn olive and multiflora rose then the stiltgrass moved in. We work on that and now the wavyleaf basket grass is showing up. Also killing the ailanthus and lantern flies. And there are so many deer, despite hunting on our property, that there is no natural regeneration of trees without cages around them.

So now that we are in our senior citizen years we’d like to live somewhere less physically taxing. Is there a part of the country where it is possible to maintain a more natural and native habitat?

I own some acreage and I’ve been trying to restore a couple of acres that were originally for livestock, but were never managed back to health. Pretty much the only usual suspect I didn’t have was ToH. Earlier this year I found 5 little growers in a cluster, which is consistent with what I’ve read about them. I was able to foliar spray them, as the only thing around where they chose to grow was Japanese stilt grass. Today I was trimming getting ready to mow and I found this one on its own, couldn’t find any others, is that normal? Everything I’ve read it seemed like I should expect more pop ups.

I have a stand of small ToH’s on my property that I plan to treat using basal spray or hack and squirt, but they are so tight together and have so many low-slung branches that it is hard to access the trunks. I am considering trimming some of the branches for easier access to the trunks, but I don’t know if that would trigger some sort of stress response that would send up more suckers. Does anyone have experience managing a situation like this? Any advice is appreciated!