TV advertising for Roundup Fast Action Weedkiller will start on 30 April and a campaign for EverGreen Mow It Less and Miracle-Gro LiquaFeed will start in May.
Representative John Clowes said: "Already, sales of EverGreen Complete have been phenomenal but TV advertising for this and other products will see sales rocket."
Scotts will be advertising three of its weedkiller brands on nationwide TV, spending £2.7m. The new one-hour claim will feature in the Weedol Gun! Max campaign and the big ticket Pump 'N Go delivery system for Roundup Fast Action RTU Weedkiller will be demonstrated until the end of June.
The "weed preventer" benefit of the Pathclear brand will feature heavily in a press campaign.
Scotts' £1.4m TV campaign for lawn care will start just before Easter, using the singing frog commercial. This will be followed in May and June by a new commercial for EverGreen Mow It Less, which will be broadcast from 20 May.
Feeding and potting will receive two separate TV campaigns totalling £1.3m. Scotts will kick off at Easter promoting Miracle-Gro Moisture Control Compost.