Herbicides are chemicals used to kill plants.

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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: ...
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2answers
55 views

How to eradicate Berberis growing in a Thuja hedge?

I have some Berberis shrubs growing inside a hedge of Thujas. They are very difficult to access. Is there any efficient chemical method of eradicating just those Berberis shrubs?
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1answer
47 views

Is adding a surfactant causing my herbicide to solidify?

I mixed Triplet SF with some non-ionic surfactant in a ratio of 3:1. The mixture coagulated and formed what looked like you might see gumming up the outlet of a soap pump dispenser. Is there ...
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2answers
1k views

Glyphosate (Roundup) effectiveness and rain

Yesterday I used around 3 litres of glyphosate (generic roundup) around my garden. It was in the evening around 6pm. This morning I woke to the sound of rain. Will the rain have diluted the ...
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1answer
507 views

Should I be using pre-emergent or post-emergent herbicide?

The air temperature is in the mid 60s, and already the weeds started to germinate. Is this a good time to spray a pre-emergent herbicide or is it too late? Should I apply a post-emergent herbicide ...
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1answer
162 views

Should I use Roundup in irrigation ditches?

If I use Roundup to keep weeds and grass out of the irrigation ditches that bring water to my vegetable garden, will it end up washing downstream and killing my vegetables? Also, will it harm my ...
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2answers
293 views

How do I prepare and sow a lawn organically?

Sowing a lawn organically seems to have 2 problems that need solving: Killing the weeds prior to sowing Avoiding weed growth after sowing Once the soil is levelled, I'm considering trying the ...
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2answers
415 views

Natural herbicide to kill weeds in a hard landscape environment?

I've got some weeds growing up between the flagstones in our backyard -- is there something natural and okay environmentally that I can use to kill the weeds? Obviously, I don't want anything growing ...
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1answer
326 views

How to prevent regrowth of elm saplings from concrete foundation?

At the base of our old garage where the concrete foundation meets an asphalt slope down to the alley behind, we've had small elm tree saplings grow as weeds over the past three years. I've never ...
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1answer
954 views

Will over spray from Ortho Weed-B-Gon Max kill my flowers?

I was spraying some Ortho Weed-B-Gon Max on my lawn, and some of the mist/over-spray got in and around my flower bed (on flowers). Are my flowers doomed, or is there still hope that they will live ...
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2answers
444 views

Good selective herbicide?

I bought a house 2 years ago in San Francisco where the yard had been allowed to do whatever it pleased. Now I have an amazing mix of clover, weeds and grass throughout the entire yard. Is there a ...
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1answer
861 views

How long before poisons like Round-up become inert?

If I spray some grass with a poison like Round-up or Kills All, how long before that spray is not dangerous to plants? So for example, if after spraying, I walk through the sprayed area and then onto ...