Salvia tomentosa

Also known as Salvia grandiflora, this is a widespread sage in Europe and Western Asia. It is quite hardy, and sets plenty of seed. It will grow to 3 ft. x 3 ft. and can look a bit untidy. The flowers, however, are quite big, and are a lilac/blue colour. Plenty of them from June until September. Dead-heading is advisable. This salvia is best grown in full sun, though watering is necessary in dry periods. Not my favourite salvia, but nice flowers, nevertheless!