Q - New LED light spectrum causing a need for Cal/Mag
A - This is a good question. To this point, we have not had any indication that cultivators were running into a Cal/Mag deficiency when they used our product in a LED setup. With that said Geoflora is formulated to have the right ratio of Cal/Mag for your plants at the different phases of growth. But if you are running into deficiencies we would suggest you supplement with your preferred Cal/Mag product.
Q - What do you suggest when Cal and/or Mag is needed?
A - Geoflora will work well with any Cal/Mag product, but if you would like to stick with an organic option
Roots Organics CALMAG from Aurora Innovations would be a nice addition if you are seeing deficiencies.
Q - My water is pH 7.9 from the tap. Is this possibly affecting the uptake of your nutrients (also day 40)?
A - That is interesting - It seems that you have found a solution as well (based on previous communications supplementing with Epson Salt). For context, 8.0 pH runs were mostly tested on larger outdoor containers with a medium with a slight fertilizer charge (Royal Gold Basement Mix) which likely gave better results than a blank slate due to better buffering. Our theory is that the product may require some minor adjustment in small container high pH scenarios, which are uncommon in an outdoor or greenhouse environment that we have done testing in. In most scenarios running at 8.0 pH isn’t ideal for a number of reasons, but it is possible and won't have major effects on the plant - however, deficiencies are always possible in extreme scenarios.
Because every strain and every plant is different, we made Geoflora to cover more than just the base nutrient needs of the plant - that being said, there may be times when adjustment is needed as with any product - with so many combinations of media, environment, and growing styles, there are a lot of factors - it seems that you have identified a good solution for users experiencing minor deficiencies in the early stages just ahead of flowering.
Another thing we noticed is that it appears that based on our feed chart, you are getting really close to the first bloom feeding - Bloom has a higher amount of magnesium available in the product as well. By our calculations, you would be about a few days from a BLOOM feed which could potentially help to remedy this as well. Regardless, the additional mag seems like a good supplementary solution to keep the plants happy in the event the magnesium in VEG is just falling short. We’re dealing with organics here so there can be outliers.
We’d love to work with you to get more info as the grow progresses so we can provide better support in the future.
NOTE - Based on your feedback, considering the common size pots, and media used by members on 420 Mag we will also be adjusting the feed chart when it comes to pH and indicate that pH adjustment may need to done if water is at 7.2 to 8.0 pH. Thank you for your feedback and for helping us to come up with solutions to better support growers who intend to use our product.