Sweet peas love cool weather; it might be getting too hot for them now. If you’d like to try, however, you can transplant them to a part shade area, in well-drained soil (not clay). They like sunshine, but they like cool soil. Organic mulch will help that, but certain mulches can also harbor slugs, especially the coarser materials such as bark mulch or straw. In the heat of the afternoon, they will need shade. Choose your planting site wisely. Good luck!
Sweet peas love cool weather; it might be getting too hot for them now. If you’d like to try, however, you can transplant them to a part shade area, in well-drained soil (not clay). They like sunshine, but they like cool soil. Organic mulch will help that, but certain mulches can also harbor slugs, especially the coarser materials such as bark mulch or straw. In the heat of the afternoon, they will need shade. Choose your planting site wisely. Good luck!