Hi

I've recently decided to start a herb garden in a bed that is underneath my
covered pergola. I would like to use the garden bed for clumping tomato
bushes (any particular varieties?), snow peas & a variety of herbs. It's not
a large garden, 1m x 20cm, but receives plenty of sunlight although no rain
due to the location underneath the pergola. I've installed some retic,
connecting it to a nearby tap with a manual timer. I've also attacked the
soil with lots of wettasoil, slow release fertiliser & dynamic lifter. Is
there anything else I should do or use? Perhaps mushroom compost or worm
poo?