Sown now in the greenhouse, dahlia seeds will produce young plants ready to plant outdoors in late May to flower this year. Seed companies sell a range of quick-growing bedding dahlias that are suitable for growing this way. You can also use this method for sowing seeds saved from your own dahlia plants at the end of the previous season.
How to do it
Gently transplant seedlings in 10cm pots of multipurpose compost, firm and and water well. In mid-May, harden off plants by standing them outdoors during the day and bringing them in at night. Plant them in their final positions once all risk of frost has passed.
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