My gardening books advise digging an allotment and adding manure and lime in
the autumn or winter. The books also say that manure mustn't be added just
before planting carrots and onions, and digging shouldn't be done just
before planting brassicas.

I didn't have any manure in the autumn but I do have some now. Is it too
late to dig, manure and lime now? I'll probably be sowing and planting in a
couple of weeks.

Thanks.