Questions tagged [herbicide]

Herbicides are chemicals used to kill plants. Use this tag with questions about how to choose and use herbicides on different plants.

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35 views

Best Base For Zero-Scape Rock Garden?

My wife and I are in the midst of a pretty massive (at least for us) landscaping project in our yard and we are to the point where I think it's important to get some advice from people who actually ...
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1answer
68 views

Why is table salt evil?

In history class they teach the military strategy Scorched Earth: "burn the villages and forests, salt the fields, come back next year to fight a starving enemy". What is the chemical ...
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1answer
21 views

How heavily are herbicide products restricted in the UK?

Recently I've been finding every product, or type of product, I read about online for specialised weed control is impossible to source in the UK. Examples include: quinchlorac products for weed ...
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23 views

best chemical to kill off grass but leave the trees alive

I have a patch of my garden with some rain trees interspersed with grass (I think its st Augustine) my question is: which chemical can I use to kill off the grass but leave the trees intact? location ...
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1answer
112 views

Will applying copper sulfate for the sewer drain kill trees?

We have old terra cotta sewer drain pipes and recently had a plumber remove a large amount of tree roots. He said we should flush root killing crystals a couple times a year. I am assuming it is ...
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58 views

Can something else grow after We spray/pour herbicide to kill a plant?

So I am facing a dilemma regarding what do to with bushes behind my house. A little background here. The bushes that I am talking about are in HOA controlled area and they are Acacia bushes. They are ...
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1answer
74 views

Will pre-emergent kill new wildflower seeds

We have had a serious crabgrass problem since we bought our house. This is on a slope that we don't want to have to mow and are looking at wildflowers as something that could out compete the ...
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Do my tomatoes look like they are damaged from herbicides?

I planted my healthy tomato starts that I started myself in some new soil that has alpaca manure mixed in. The original, old growth is fine, but the new growth is all spindly and twisty and curling ...
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1answer
53 views

Ivy or something else? Want to know the accurate name

Please see the pictures. It grows every year in my back yard. I dragged it out but it just comes back. It pricks skin. I don't know the English Name so I don't know how to get rid of it by DIY. No ...
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Pepper plants are showing strange, deformed new growth, what could it be? Virus? Deficiency? Herbicide?

New-ish gardener here! This year I have planted 5 varieties of peppers in a brand new raised bed in central Arkansas (zone 7b). Fill for the raised bed is 100% compost purchased from a local plant ...
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3answers
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Re-sodding to solve weed problem without use of herbicides

Our lawn is overridden with weeds (mostly dandelions and clover). Part of the problem is we have not done much to maintain it over the years and also we don't use any herbicides. I wanted to tear up ...
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1answer
283 views

Do my tomatoes have aminopyralid herbicide damage?

Photo below of my tomato plant. This was planted in 3 inches of miracle grow with composted horse manure below, sourced locally. Everything was fine for about 2 weeks, then this morning I noticed that ...
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How concerned should I be about herbicides in compost horse manure?

I just filled most of my raised beds with locally sourced composted horse manure. When I was looking for straw mulch I started reading a bunch of horror stories about aminopyralid contamination in hay ...
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1answer
62 views

What type of grass am I dealing with and how to get rid of it!

Can anyone please help with the identification of this weed grass in my lawn? I live in the Pittsburgh area. It is like a lime green with purple stems (see Photos). The stems are thick and course. I ...
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1answer
63 views

Does the glyphosate in our urine make it improper for use as a fertilizer?

It is known that urine has many positive effects on plants due to its chemical composition (Nitrogen, Phosphorus, Potassium). However, it is now also known that even organic food consumers end up ...
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1answer
35 views

Using Roundup to Kill Weeds

I sprayed Roundup 2-3 days ago on some tall, tough weeds. If I mow those same weeds down, will the Roundup still kill them?
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1answer
360 views

Herbicide for shameplant and not grass

My lawn has been overrun by the shameplant (Mimosa Pudica). It is a rather large area. Is there an herbicide that will kill the shameplant and not the grass? Some pics of the lawn here.
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451 views

Sequencing for tick, weed and fertilize treatments for lawn

Northeastern US here in case that makes a difference in the answer. I have a back lawn as pictured below. Section A is a grassy slope and Section B is flat grass lawn. We have two small kids that are ...
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3answers
511 views

Turning my existing lawn into something more presentable. Will tilling kill everything so I can start from scratch or do I need herbicide?

I'm in Eastern PA and as it's just the start of April - I would like to turn my poor excuse for a lawn into a nice, level, uniform grassy green lawn. It's currently very uneven with high spots, low ...
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177 views

What type of weed is this and what is an effective way of removing it?

This weed kind of took over my front yard (around 300 sq ft). I'd like to remove it all and then mulch most of the area What type of weed is it and what would be an effective way of removing it? In ...
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1k views

Options to kill/remove invasive buckthorn

I have a large number of mature buckthorn shrubs in my yard that were there when I purchased the property. This is classified as an invasive in North America. Not only is it problematic in terms of ...
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2answers
482 views

Will glyphosate directly harm Monarchs or other butterflies?

A large portion of my yard is infested with (non-native) Japanese knotweed, which is nearly impossible to remove without herbicides. I have been waiting until late summer/early autumn to begin an ...
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1answer
59 views

Is there a selective herbicide for crabgrass that can be applied during high temps?

I'm in Alabama zone 8a, and crabgrass is taking over my Zoysia lawn. I just purchased the home and was not able to put down a spring preemergent. The crabgrass infestation is pretty thick in spots and ...
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3answers
231 views

Control of oxalis corniculata

I have a "plague" of Oxalis corniculata in the middle of Vinca minor. Is there any way to eliminate it chemically or just tearing it off?
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Weed control 1 year before installing turf

I want to install irrigation and turf in my backyard sometime next year. Related questions have been asked, but the focus is mostly about soil preparation. In my case, a variety of grassy and ...
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Control of Hyacinthoides hispanica (Spanish bluebell) in an established landscape

We have several well established beds that are infested with Hyacinthoides hispanica (Spanish bluebell). For a variety of reasons I am unable to dig them out or use "petrochemicals" like RoundUp so I'...
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118 views

What is proper way of disposing weed treated with herbicides?

I would like to know what is proper way of disposing weed treated with herbicides? Is it safe to use tree killed by herbicide as firewood?
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Is it safe to use herbicide without clear withholding period?

This year I would like to get rid of weed around wire fence and I'm considering using herbicide. As much as I can see all non-selective (glyphosate) herbicides available at local stores have no ...
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Will the yellow stain from prodiamine come off of white landscape stone?

I hired landscapers to do a ton of work at my house and one part was to fill a very large area with white landscape stone. Contract stated they would put paper under it then the stone. They did not ...
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2answers
125 views

How do I remove one of two different plants growing in the same spot?

There's a shrub planted in the corner of my property, that the previous owner put there to help mask the utility pole behind it. I kind of like this idea, but there is another plant growing in the ...
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1k views

What is this weed and how do I kill it without killing the grass?

What is this weed and how do I kill it without killing the grass? I've tried different brands of the usual spectrum herbicide that kills everything but doesn't kill grass, and everything - like ...
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3answers
7k views

How can I remove crabgrass from a Zoysia lawn, and flower beds?

We just bought a new house in Orlando. The home is great but we noticed crab grass taking over and a few other weeds. I'm a total noob with grass stuff, although I'm researching all I can. The grass ...
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1answer
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How long does Copper sulfate pentahydrate persist in the soil, after application?

In particular, I am interested in it's effects after it has been applied and the roots affected have been largely removed. Does it break down over time, and if so what is the time frame? What will ...
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Procedure to ensure herbicide uptake in Japanese knotweed [duplicate]

I am planning to eradicate a stand of Japanese knotweed by injection of imazapyr. This bamboo-like plant develops a rhizome system far below the ground and the only way to kill it is allow it to ...
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1answer
8k views

How long for glyphosate to penetrate plant

How long between spraying Glyphosate and the Glyphosate "getting in place" to kill the plant. My issue is this - I want to make productive use of an area overrun by very well established weeds - and ...
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1answer
468 views

How do I naturally eradicate a stand of invasive bamboo?

I am on a 1 acre hill-side near the Oregon coast. The previous owner of this property decided it was a good idea to plant some type of invasive bamboo that covers a good 50% of the property (mostly ...
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1answer
262 views

Need help controlling purslane germinating after seeding new lawn

I recently reworked a small section of my lawn (200 sqft). This work included solarization, tilling in some compost, rolling flat, spreading seed, top dressing with compost and rolling again. With ...
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2k views

Why does Tenacity® (mesotrione) kill bentgrass but not other grasses?

Tenacity (mesotrione) is used to kill bentgrass, clover, and other non-desirables. I get how an herbicide could selectively kill broadleaf weeds while leaving grasses alone, but how does it manage to ...
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3answers
248 views

Elimination of Japanese Knotweed by injection

I have a Japanese Knotweed problem in a limited area (about 15x15 feet). It is very difficult to dig up the roots because they can be a good 2 feet underground. Therefore I am considering death by ...
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2answers
1k views

Is it best to wait for poison ivy to fully sprout leaves before spraying it?

I have a fair amount of poison ivy growing on one part of my fence. Now that spring is here, it's just barely started to grow again, and buds that will turn into the dreaded leaves have began to ...
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1answer
208 views

Variegated Arboricola shrubs leaves wilting

What can I do to help this Variegated Arboricola to grow healthy and stop wilting? I am in Southern Florida. I was spraying my lawn with Ortho® Weed B Gon® Weed Killer For Lawns Ready-To-Spray2 which ...
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1answer
955 views

What is the most effective way to eradicate burdock, curly dock and mugwort from a field?

We've got a small "meadow" area that is in bad shape from new home construction. Despite heavy seeding with native warm-season grasses and proper mowing, the area is overrun with mugwort, curly dock, ...
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1answer
134 views

Can I add commercial roses to my compost pile?

I'd like to add commercial roses to my compost pile, but don't know if I can. I'm not sure what kind of chemicals store bought roses are usually treated with. Bonus question: Can I dump the water in ...
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What are the uptake and decay rates for Spectracide® Weed Stop® for Lawns?

Once a lawn has been treated with Spectracide® Weed Stop® for Lawns how long are the active ingredients 'active'? Do some decay faster then others? Following the links from the Manufactures site ...
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1answer
2k views

Is Clopyralid or Dicamba more effective in the control of clover in lawns?

September's coming up, time to start getting ready for clover control. I have always used Clopyralid (3,6-dichloro-2-pyridinecarboxylic acid). The brand I use is Lontrel. My question is, how well ...
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2answers
154 views

Can I use herbicides in flood conditions without harming good plants?

In Arizona, USA, it is monsoon season, meaning that our dry, arid, and rainless state suddenly gets a lot of rain over the period of about two months. This sort of flooding is perfect for spreading ...
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2k views

Is it safe to eat dandelions previously treated with a selective iron herbicide?

Three years ago, I started trying to reduce the number of dandelions in my lawn with a household selective herbicide named Scotts® EcoSense® Weed B Gon® (MSDS and retailer product page). The ...
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2answers
3k views

Will glyphosate based herbicide work with a food thickener?

I would like to thicken some Roundup to form a drip-free paint for targeting weeds in groundcover beds. If I use Thick-It starch based food thickener, will I get the result I want? I would be watering ...
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85 views

Targeted Glyphosate use on hardy nettles

We're about to begin our vegetable garden, and we have had some trouble in the past with a nettle that is particularly nasty. Our plan is to apply glyphosate based herbicide directly to the freshly ...
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1k views

Why is triclopyr not available in California?

I'm considering using a triclopyr based herbicide to defeat some clover in my lawn (dwarf fescue) in San Francisco, CA. For example, there is this product: http://www.homedepot.com/p/Ortho-Weed-B-Gon-...