Posted: 19/06/2014 at 21:06
If the holes are irregular, they are probably caused by snails and slugs. Yes, they really go after sweet peas; especially when the plants are young. Not so much after, but they will get the lower leaves. If it is leaf miners, you could spray with soap and bicarbonate of soda; but wash the leaves after and do this in the morning when the plants have time to dry off; otherwise you could get mould and mildew.