The brand, which has 59 per cent of the market, will be in a range entitled Vitality Activator Effect in five new products for flowers and edibles, with prices at £7.99 for 750ml aimed at the "creative gardener" category.
Product manager Alison Mulvaney said focus groups asked why Bayer had not extended the Baby Bio brand outside before and found that there was 98 per cent promoted brand recognition for Baby Bio.
She said Bayer's previously focus had been on pest and weedkillers but it is now on a "more rounded portfolio", particularly fertilisers, because of "pressure from regulatory bodies".
Mulvaney argued that neonicotinoid issues, which saw imidicloprid go under a two-year moratorium on use in 2013, are not based on scientific information and were driven by NGO pressure. She added that if research proves it is safe to bees: "I hope it gets reinstated."
Also new from Bayer is Fungus Fighter, which controls box blight.
The weedkiller market was 8.8 per cent up in 2014, while the pest and disease killer market was up 24.5 per cent, comparing January-July 2013 and January-July 2014.
Mulvaney said because slugs overwinter, a wet summer would bring them back in big numbers for a third year in succession.