What to do this week: tweak tomatoes and rein in rocket Use beer, pellets, copper tape, crushed shells, grit or wool/sheep pooh pellets to deter snails (growaid.co.uk). Tweak tomatoes Remove with finger and thumb the small side shoots that appear on tomato plants. Feed plants with tomato food once flowers appear. Pick off peas Pick off any faded sweet peas you miss when in flower. If allowed to set seed, flowering diminishes.