Keep your lawn weed-free with Roundup Speed Ultra Weedkiller RTU 1L. Roundup Speed Ultra is a fast-acting multi-purpose weedkiller for use on unwanted vegetation. It can be used to kill broad-leaved weeds and grasses in paths, drives, patios, and around the bases of roses, ornamental shrubs and trees. It shows visible results in one hour. Treated areas can be re-planted or re-seeded the day after treatment. Ready to use. Use weed killer products safely. Always read the label and product information before use.