This is a superb variety with unusual soft lilac flowers and very dark green leaves. Dahlia Blue Boy will provide a long period of colour in your garden as long as the dead flower heads are picked off. Accordingly Dahlia Blue Boy is a unusual addition to any garden and easily grown in borders or containers.
Plant Indoors: Dahlias are best started off indoors from January to March as they are sensitive to frosts. Plant in a mix of multi-purpose compost, sand and grit as this will provide drainage for the tuber. Protect young shoots from snails and slugs and when the fear of frosts has passed the tuber can be re-planted outside or the container positioned outdoors.
Plant outside: From Late March on wards, when the signs of frost have passed the dahlia tuber can be planted outside. Plant tubers into well prepared soils in late March to April. Soils should be cultivated to a depth of 20cms to allow good root development. Plant tubers in fertile soils with 5cms of soil above the top of the tuber. Protect early growth from slugs and snails and remove dead heads during the flowering season to get the best from them. Regularly feed during the growing season with foods such bone meal or tomato food will provide food for continued flowering.
See our article on dahlias here
Dahlias can be left out over winter in well drained soils, just mulch to give added protection.
Ideal to grow with companion plants such as crocosmia, asiatic lilies or many types of shrubs.
Flowering Height: 32-40″ (80-100cm)
Flowering period: July to first frosts
Soil type: Free draining humus rich soils
Aspect: Semi shade to full sun
Planting distance: 80cm between dahlia plants
Planting depth: A depth of 5cms above the top of the tuber.
Full growing instructions are also provided