Graham Smith, garden expert at LBS Horticulture sums up the best products to add to clay soil: 'The best materials to add to clay soil are organic compost, bark chips, composted leaves or gypsum ...

Gypsum, for instance ... By thoughtfully incorporating soil amendments in December, you ensure that your garden soil is well-structured and nutrient-rich, ready to support a vibrant and productive ...

Where to buy alkaline tolerant grass seed, how to deal with annoying snow mold, when to rake up those leaves and tips for ...

The Washington Department of Agriculture does this certification. It is the same for garden soil blends sold by the soil material companies. They aren’t certified organic but certified as usable ...