Fertilzer cycle.

[Alam64]

This is information age with loads of info on youtube and net. Sometimes it becomes confusing. The link i have posted mentions bimonthly fertilization, however somewhere i read in winter fertilization shouldnt he done. What approach should i follow.most of my plants are summer plants, only exception being petunias and pansies.
The second question is that it discourages using chemicals for food plants like tomatoes and chillies. Is that correct or can we use chemicals sparingly. If we cannot use is manure recommended?

[Izhar]

Yes you can use synthetic fertilizers in small quantities... summer plants dont require fertilizers in winters... fertilizing is only done during active growth...

[Alam64]

Thanks