When to start using nutrients

iv got 3 plants second week into flowering. I went to the store, told the clerk iv been just watering with RO water, and the dude sold me on:

CalMag liquid ( he said if im ROing my water ill need it)
Advanced nutrients "connoisseur" parts A & B
advanced nutrients (Big bud) he said it was an additive..

He told me to mix them in all together as directed but make sure u put part
A in first before anything.. Now on the CalMag bottle it says, When using RO water add CalMag in first before adding advanced nutes. Should i listen to the bottle?

Noobie. Kinda said:

iv got 3 plants second week into flowering. I went to the store, told the clerk iv been just watering with RO water, and the dude sold me on:

CalMag liquid ( he said if im ROing my water ill need it)
Advanced nutrients "connoisseur" parts A & B
advanced nutrients (Big bud) he said it was an additive..

He told me to mix them in all together as directed but make sure u put part
A in first before anything.. Now on the CalMag bottle it says, When using RO water add CalMag in first before adding advanced nutes. Should i listen to the bottle?

Click to expand...

Id listen to the bottle, ya cant listen to the plants cuz they are untrustworthy. I feed my plants bases on what the sales reps say first, then what the bottle says if I cant find a rep and then what the plant says as a last resort

fertilizer from second week vegetation then no stop. if you go from vegtetaion to flower stage dont stop fertilizers just change fertilizer. stop fertilizer just 2 weeks before harvest. thats all

If it's DWC, just start with your full strength in the reservoir. (around 1.2-1.4EC)

If possible, try to keep the cubes wet with that solution until roots hit the water.

...

Or you could take the common advice and starve your plant for 2 weeks until they have low turgidity and are pale in color. "Should i start feeding yet?". "Yes! good thing you waited! now is the perfect time to stop starving your plants!"

Even soil, if done properly, should contain enough nutrients for an entire grow... Obviously nature/soil doesn't hold out for 2 weeks. It starts providing the plant with the ions it needs from day 1.

Cotyledons provide mostly starch.. They do not provide "Everything" a plant needs. Seedings are still expected to pull minerals out of the ground, especially immobile ones that can not be relocated through the phloem.

Sure, the seedlings will live for 2 weeks, but growth is always stronger with a good nutrient solution or soil.