Flowers to be proud of

Do you have to pick all the sweet peas to keep them flowering? My 3 plants are giving me more than enough flowers so my thought of growing more next year might go on hold.

If you let them produce seed they will stop flowering, so either pick or dead head them regularly.

Personally I pick all the flowers that have all buds fully open every 2-3 days and stick them in vases around the house. Any that have gone over get picked and dropped at the same time. This still leaves quite a bit of colour in the garden from the partly open flowers, and fills the house with perfume (I picked 116 flowers yesterday). After 2 or 3 days the perfume has mostly gone away and they are starting to drop, so they go on the compost and I pick the next lot.