So a small amount of limestone is included to adjust the pH into the ideal range for nutrient uptake. I didn’t come up with this mix, we can thank Mel Bartholomew, the author of Square Foot Gardening, for simplifying the best soil to use for raised bed vegetable … Best Soil To Grow In Shallow Containers. So you should provide the best kind of soil … Plus, Moisture … The best soil for squash is a mix of one part each perlite, peat moss, potting soil, sphagnum, and compost. These plants will need seven hours of full sunlight exposure and a trellis for support. Organic material can come from either a compost or well rotted manure, or even a combination of both.. Nitrogen, Phosphorus and Potassium – When it comes to soil preparation for vegetable garden, these … And to further encourage healthy growth and increased vegetable yields the potting soil … If you’re wondering what the best soil for raised bed vegetable gardening is, that’s an easy answer – “Mel’s Mix”. Vegetables usually grow best when the soil has a pH between 6 and 7. Soil is the most important factor in this kind of gardening because plants have a very small and limited medium to grow in. Vegetables and Herbs … Enriched with a blend of compost, plant food and other essential nutrients, it will feed plants for up to 3 months. Grow a bountiful harvest with Miracle-Gro Garden Soil Vegetables and Herbs! Vertical growth is recommended.