You may want to consider adding a mulch of ground up leaves, shredded pine bark, etc. The root system of your plants will enlarge as time goes by and earthworms will tend to move into the area if they already have not done so. They will eat the mulch and the worm castings are an excellent source of nitrogen fertilizer for your plants. In general, you will find the soils around plants treated with BioVam will remain loose and well aerated from the earthworms that move in, and from the Mycorrhiza fungi that grows out into the soil from the roots of your plants. The root system of the plant will grow larger and the plant will become healthier.
Healthy plants tend to resist disease and insect damage better than weak plants.
Superphosphate fertilizers in particular will keep the Mycorrhiza fungi from forming a Mycorrhizal relationship with your plants. If the fungi have already formed a Mycorrhizal relationship with your plants, then the addition of such fertilizers may damage your plants. Avoid the use of green manure. The quick release nitrogen from green manure is not good for soil microbes. Use only well aged composted manure.