Whilst you may have a perception of dahlias as being old fashioned and what granddad grew when you were younger they are enjoying a renaissance in the last few years as they provide such stunning colour and value for money in the late summer and autumn r so easy to grow as they are supplied as tubers packed full of energy to burst into growth in spring plant in pots or in the garden they will get away quickly from may and produce a mass of bright colours which will pepper your garden li