Are these photos or AUTOS .?
If they are AUTOS , here is a pretty foolproof feed schedule. ( without booster supplements or additives. ) this for Soil mixes like ( roots organic , Pro Mix HP or FFOF Fox Farms Ocean Forest ( I use this ). Most "Super Soil " mixes have more than enough nutrients for up to Week 4. I use PH WATER around 6.0 - 6.3.
1 week(seedling) – Ph adjusted water
2 week(start of vegetative) – Ph adjusted water
3 week(vegetative) – Ph adjusted water
4 week(pre-flowering) – 1/2 veg nutes
( important to stick with VEG nutes during PreFlower stage )
I flush during this week INSTEAD OF WATERING to clear medium for BLOOM
NUTES .
5 week(first flowers) – 1/4 bloom nutes
6 week(flowering) – 1/2 bloom nutes
7 week(flowering) – 1/2 bloom nutes
8 week(flowering) – Ph adjusted water
9 week(flowering & harvest) – Ph adjusted water till harvest
Some Strains CAN push further beyond harvest estimates , so adapt to your own grow.