i have some Salvia officinalis (mint) growing at the moment after recently being planted. as far as im aware the sunlight is good, not to intense during the day, good soil and drainage. the problem is that the young ones leaves are slowly getting more and more holes in them, starting off fairly small but have progressed to fairly noticeable damage. my hunch is that they are being eaten by passing insects. ive examined the leaves during the day and night for pests as well as the soil but to no avail. no snails, caterpillars, mites, weevils or aphids. unfortunaelty i dont have a camera so photoes are not available, however does anyone know of any general natural means of protecting my young plants from this invisible onslaught? any help is much appreciated