@angel2 you’re light looks set right. The feeding you won’t need to worry about till flower if they’re autos. I’d get some CalMag in the mix to stay ahead of it.
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Do I need to flush my Coco and Perlite mixture prior to planting my seedlings?
I haven’t switched to coco yet and I’m not exactly sure what you mean.
Flush no. But some brands do need to be hydrated and buffered. Presoaked with properly pH’d water that has nutrients in it as coco has none.
Its very important to ALWAYS mix calmag 1st before anything else. Then add the trio one at a time mixing between each bottle