Veg mixed variety supplier?
 

I've had good results with successional sowings of lettuce, to ensure that
the crop doesn't harvest all at once. However, not much luck with brassicas,
dwarf beans, parsnip and swede.

Buying 2 or 3 varieties of say, cauliflower, to extend the harvest season,
isn't an option. Does anyone know of an online supplier, who will provide a
packet of mixed varieties. The local DIY store stocks mixed lettuce, but
lacks assorted pkts of other veg. TIA.
Bertie