42% off ALL ROOTED LEAF NUTRIENTS STARTS NOW! USE CODE GROWCAST 420 for 42% off www.rootedleaf.com RIGHT NOW! ALSO- BOGO (limit two) ALL MONTH LONG AT GROWCAST SEED CO! No code required, just order and get an extra bogo, dealers choice, limit two! www.growcastpodcast.com/growcast-seed-co  Nik returns just before 4/20 with an episode for our nutrient deep dive series- this time focusing on the development of nutrient formulas themselves. Nik gives a good overview of the history of fertilization, from ancient people's following kelp blooms for fertilizer harvests all the way to the comparatively recent development of modern petro fertilizers. This leads to a conversation about how cannabis specific targets are a new and developing science, and how even now you can find some blends where the nutrient levels are way out of whack. Nik talks about the importance of calcium delivery and how Rooted Leaf differs from so many other lines- which leads to a conversation about the evolution of chelating agents, including a very interesting story about anthocyanin acting as a nutrient chelator. Nik wrap the show by reminding folks that Rooted Leafs HUGE 420 sale is on, code GROWCAST420 saves you 42% on ROOTED LEAF NUTRIENTS! GrowCast Membership Weekly Live Streams - Personal Garden Advice- 100s of HOURS of Bonus Content  - MEMBERS ONLY DISCOUNTS! Join the greatest community in cannabis! GrowCast Seed Co VAULTED PACKS ARE UP! Members get $20 off PER PACK! Code growcast15 now works with grow KITS from AC Infinity! www.acinfinity.com use promo code growcast15 for 10% off the BEST grow fans in the game, plus tents, pots, scissors, LED lights, and now REFILLABLE FILTERS!