The mulch can insulate the soil in winter which helps to protect plants during cold weather. In addition, pine bark can provide ... it may eventually make it more acidic if you're constantly ...

Using a layer of mulch ... soil surface can prevent this. Follow our guide to mulching, an essential garden technique. Many different materials can be used to cover the soil’s surface, including ...

Whether cedar, pine, or hardwood, bark mulch breaks down ... as they break down in the soil they can be altering the pH. While roses can tolerate some acidity, they do not like extremes.' ...

you could use the leftover pine needles and even the bark to mulch hydrangeas, as both will help make the soil more acidic. The gardener said: “Hydrangeas prefer slightly acidic soil (pH 5.5 ...