Can I mix the annual seed with perennial seed?

No. If you are trying to establish a proper perennial meadow then do not put annual seeds with the mix. Annuals will very quickly out compete the slower perennials and create bare patches later in the season which will encourage weed infestation. If you want a hybrid mix that is very easy to establish and will flower happily for 2-3 years or more use our ‘Magic Carpet’ mix.