How long before rain can I typically apply copper sulfate and be effective?
591187
I've not tested your question, but I saw results within 48 hours ... of course, with full sunshine. I would think even 24 dry hours would help tremendously.
591188
Mike, It's best to spray on a calm day when no rain is in the forecast for 24 to 48 hours. Hope this helps.
1723007
It is recommended that you apply liberally 15 minutes before sun exposure and reapply every 2 hours. One bottle might suffice, however, you may want to bring two just in case.
1436034
great question. I applied this product a day prior to a rain storm. after the rain storm I noticed that the rain did not dilute the effectiveness of this product. exactly a week later all my weeds r all brown and withered away
1194947
I live in Ohio - I have only used it in my rain barrels. I do have to say, that I have had water in my rain barrels up to 4 weeks (because of no rain) and this product has done a good job!
1893020
The best thing to do is apply before you go to bed (wear long pants and shirt in dark colors to protect your sheets, just in case). Then rinse off in the morning, or at least 8 hours after applying. You will see some come off in the shower. After that you should be good and you don't have to worry about it coming off in the pool or anything.
1244320
I can say best time is after the last snow fall in late February- Mid March. You could still apply it now and see the difference in your lawn in 6 weeks (greener). Hopefully you will have some precipitation for a few days after you apply it. It will still work, but mostly everyone is preparing for Phase 2 a Turf Builder with a weed halter.
686290
Yes. 0.5 of rain or irrigation within 3 days of application is required to activate the product. See "General Use and Precautions" on the label.
268054
A few minutes at most. Don't let it dry before coming back to rinse. I found it best to work in smaller patches.
176280
If you want to completely sterilize the ground for 2 to 3 months This is perfect. I spray along the driveway, sidewalk, mailbox, patio concrete, drainage ditch, what you spray is dead, for three or four hard rains. I apply it, three to 4 times a year.
2180630
My limited knowledge of Copper Sulfate is: - it's more toxic than the active ingredients in Roebic and can effect surrounding trees as the roots can uptake this stuff into the main part (systemic). This stuff kills just the roots, more topical. I use copper sulfate (blue crytsals) dissolved and dilluated in a spray to remove lichens and moss on my shaded shingles in N. WI. Works like a charm, but becareful where the downspots go, kills everything it comes in contact with.
202092
I would say an absolute minimum of 24 hours, under dry conditions. To be safe, go a few days. You want the oil-based solution to have completely evaporated and left behind only the preservative chemicals. When I used copper green, I couldn't find any information on drying time. But most penetrating oil-based solutions (like stain, or like copper green) recommend 24 hours. This web page has some useful information about staining on top of a preservative: http://www.paintpro.net/articles/pp903/pp903-wood_finishes.cfm No dog in the hunt re. that link - just thought it good information. Good luck! I would say an absolute minimum of 24 hours, under dry conditions. To be safe, go a few days. You want the oil-based solution to have completely evaporated and left behind only the preservative chemicals. When I used copper green, I couldn't find any information on drying time. But most penetrating oil-based solutions (like stain, or like copper green) recommend 24 hours. This web page has some useful information about staining on top of a preservative: http://www.paintpro.net/articles/pp903/pp903-wood_finishes.cfm No dog in the hunt re. that link - just thought it good information.... » Read More I would say an absolute minimum of 24 hours, under dry conditions. To be safe, go a few days. You want the oil-based solution to have completely evaporated and left behind only the preservative chemicals. When I used copper green, I couldn't find any information on drying time. But most penetrating oil-based solutions (like stain, or like copper green) recommend 24 hours. This web page has some useful information about staining on top of a preservative: http://www.paintpro.net/articles/pp903/pp903-wood_finishes.cfm No dog in the hunt re. that link - just thought it good information. Good luck! « Show Less
508040
I used a hose end sprayer. Figure out how much you need for the area in square feet you are going to treat. Put that much in the reservoir and fill with water. The granules dissolve quickly, shake often to keep well mixed as you spray. I use a moderate setting and apply evenly over the area. It is important not to try to do more than 3-4000 s.f. in one go because you need a moderate flow rate from the mixture to make sure it works well.
1510261
Depends on rainfall, temperature, and application conditions. About a month if you want an average.
328934
Depending on rain, I usually reapply once every two months. But it depends on your neighborhood, rainfall, etc. I do add Gordon's Spreader Sticker to the bottle (one tablespoon) to help it adhere and stay water fast longer. This is part of my every two to three month regimen of spraying my foundation about two feet up on the wall and two feet into the lawn and landscape. Bugs can't crawl into your home that way and you don't have to worry about spraying chemicals on the inside. It's also great to spray generously around garage door openings, window sills, etc where you don't want easy access for insects.
602524
It is best to wait until it dries. depending on humidity and amount of water applied at time of application that can be 1 hour
1692870
No. However, my dad used to use copper sulfate to control algae in his catfish ponds. (I said used to - he is now deceased.) Hope this helps.
1624041
I used Triclopyr 4, mixed with water and dish detergent. Extremely effective. Don't apply before a rainfall, but otherwise, because of the clinging properties of the detergent, any time will do