If I were you Lizagrowbag I would just rake some general fertilizer(Growmore or chicken manure pellets its what they use around here) in for now,but if you have some well well rotted manure you could put some of that on thats all I am using for now and gonna apply manure later in the year,if it is not well rotted(I am not an expert)it may burn your roots on your plants killing them off ;D