Did you know applying vermicaste (worm poo) onto your plants is very beneficial to them…& even more so during winter. You rarely hear about this because the big fertiliser companies have all the advertising dollars & also pay the ‘garden gurus’ …yes they need to get paid. Vermicaste has billions of beneficial plant microbes that will live on the leaf & around the roots. They aid the absorption of nutrients & moisture while protecting the plant against heat & cold stress, disease & insect attack. A more healthy plant results with more & bigger flowers & fruit.
You can add a little fish/kelp fertiliser as both of these are reknowned microbe foods which will multiply them. No use adding any artificial fertilisers when its cold as they will not work when soil temperatures drop below about 21oC