Once ripened to a fully coloured stage they are generally considered to be at peak flavour. When my tomatoes have reached a good size and are colouring up, how do I know when to pick them for peak flavour and nutrition? Both the sweet pea varieties and their growing conditions are factors in the strength, health, and bloom production of the vines. You can access a trial of sweet peas on the West Coast Seeds website by typing “West Coast Seeds + sweet pea trial” into a search engine. The description of Mammoth includes its designation as the “florist’s sweet pea.”