A healthy garden has pests and diseases, sometimes lots, sometimes just a few. Many things that are pests to us are food for something else. They are part of the ecosystem and a healthy garden can sustain them without damage.
The joy of picking a posy of highly scented sweet peas is one of the highlights of summer for some. To get them growing as soon as possible, you can start sowing now on a warm windowsill or a heated propagator.