I've found most software don't cater for intensive horticulture that well but there are two options I'd suggest you look: tend and livefarmer
tend.com which is a seed to plate software that is very intuitive and will even host a website for you so you customers can order directly from you. It's pitched towards smaller businesses
the other is livefarmer which is a all in one software. More complicated to setup than tend but will cover off every task required from a compliance point of view. Livefarmer suits the medium to large farming operations.
both products are great but which one you choose would likely depend on your required level of compliance and how big your operation is.