Posted: 25/04/2016 at 21:11
As I understand it, seed compost is usually lower in nutrients, and possibly freer -draining, than general.potting compost, because seedlings do better without the extra nutrients.
Having said that ... Which? do a test of composts each year, and this year they found that Verve multi-purpose compost (B&Q own brand) was just as effective for raising seeds as their seed compost which was, like most seed composts, more expensive. I have used Verve MP this year with very good germination and growth, and it's handier - and cheaper - just to have the one type of compost on the go.