Hydrangeas in pots

There is no end to the uses of Hydrangeas in pots; a well-bloomed plant will give life and interest to many an uninteresting corner; the bloom is long-enduring and stands equally well in sun and shade. If the blue colour, which comes naturally in some soils, is desired, it can be had by mixing pounded slate and iron filings with the compost�alum is another well-known agent for inducing the blue colour. But I have much faith in slate, for the bluest I have ever seen came from a garden on a slaty soil.