Roundup needs 8 hours before a rain and being cut. Dairy farmers can spray a field of hay 10 hours before they cut it. After the hay is bailed and removed from the field the stubble will not come back and die.

I would spray round up 8-10 hours before a rain. If Ag grade put four Oz in a one gallon hand sprayer. I would spray just before sun set about one hour. This time of the night or evening weeds or all plants open up their pours to take in dew for moisture. They will take in the product more effectively and die much faster. It is believed that you can cut spray rates in half if sprayed at dust or at night.

IF the weeds are in seed or in head they will be much more difficult to kill off with any spray. They need to be actively growing for all spray to work. Adding two table spoons of miracle gro 18-18-18 per gallon will really help activate round up and get a good complete burn.

If you want to just spray house hold ammonia straight it will do just as good of a job as round up. Again the weed can't be in head or seed and not growing. Spraying straight ammonia during the day when it is dry is best for a good torch.

Cheers Don.

Last edited by DonoBBD; 08/10/18 08:31 AM.

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