When we foliar feed, we spray full-strength CropSalt straight from the nutrient reservoir: the same finished feed and the same ratios on the leaves that the plants get at the roots. It's the best foliar mix we've found, so we don't use a separate foliar fertilizer. We generally stop around day 12 of flower and only spray after that when there's a specific need.
Our thinking is simple. If the plant is growing well on those ratios through its roots, why change the mix for its leaves?
Take it straight from the reservoir
Use the ready-to-feed solution at the correct A:B ratio. Full strength means finished feed, never stock concentrate, dry powder or a cleaning solution.
The bleach and RunClean already in a correctly mixed reservoir are safe to spray in our use. That means regular unscented bleach (6–8.25% sodium hypochlorite) at the normal 0.2 mL per US gallon, and the RunClean you used to bring the feed to target pH. Don't add extra bleach or RunClean to the sprayer, and never spray the 10 mL per gallon shock solution we use to clean empty systems.
When we spray
Foliar feeding is an option when we need it, not a required extra feeding. After about day 12 of flower, we only spray for a specific reason.
If a root-zone or irrigation problem is why you're spraying, fix that too. Feeding the leaves won't repair an outlet that isn't delivering to the roots. See what to check when part of a room misses an irrigation.
No separate silica spray
We don't use silica as a foliar or in the reservoir, and CropSalt doesn't need it. If you use a silica product anyway, keep it out of the reservoir and follow its foliar label; that rate doesn't come from our feed chart. More in why we leave silica out.
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