If you soak the seeds in a glass of water overnight, before sowing them, they germinate a lot better!
Seed requires darkness to germinate, so make sure the soil covers it.
For Square Foot gardens, 1-2 seeds per sq. ft. is plenty. Sow at least 6" apart for 2 plants per sq. ft. (gets very bushy) or 1 per sq. ft. for more a manageable plant.
By our calculations, you should look at sowing Peach Melba about 14 days before your last frost date.
As the seedlings develop, thin to achieve a final spacing of 25cm, or 6-12".
Plant after average last day of frost; in very hot summer regions, plant in fall for winter bloom.
nasturtium