When choosing between cannabis seeds, you will run across the following types of cannabis seeds. After applying Scotts Turf Builder Weed and Feed 3, weed stems will usually begin to twist and curl in several days, but a month or more may be required to see full control. Weed emergence was determined by counting seedlings weekly during the growing season.  Source: <a href=https://nadaroadsafety.org/2023/07/weed-seeds-commonly-present-in-specific-vegetable-crops>https://nadaroadsafety.org/2023/07/weed-seeds-commonly-present-in-specific-vegetable-crops</a>