This container mix will help your flowers stay vibrant all season:

• 1 bushel (35 litres) peat moss
• 1 bushel (35 litres) perlite or vermiculite
• 1/2 lb (228 g) dolomitic limestone
• 1 lb (450 g) 5-10-5 fertilizer
• 1 1/2 oz (43 g) super phosphate

Find more container gardening tips here.