Good morning all was wondering if you agree with me on a possible (K) deficient plant. It’s a Bruce Banner auto week 9.
Light is a Growers choice ROI E720 + under canopy
Nutrition is Cutting Edge Solutions Louder Powder + Humboldt snow Storm and Crystal Burst, CYCO B1 boost and CYCO Pot ash and Unsulphered Molasses
PH is 6.2
Thank you all and have a happy Easter
5 Likes
That’s Calcium spotting
4 Likes
Thank you for looking at this for me it’s strange o have brought several pls da to harvest and haven’t had this problem. Take a look at the labels it doesn’t appear the Bloom side has very much calcium at all. I have some Cal-Mag I can add tho….does that sound right to you ???
Oh by the way I am from Central Florida as well Clermont to be exact…
Have a good Holiday 
2 Likes
You didn’t specify your medium
Outta range for Ca uptake in soil. Could have all the nutrition but be locked on pH. We’ll not locked but a trickle
4 Likes
@OGIncognito @Growdoc @MidwestGuy can help more than I could in this situation.
5 Likes
Thanks for the tag brother, @Cpuglisi , what medium are you in? Your PH would be right for Promix. Coco can run from 5.7-6.1, but I keep mine within a point tenth or so from 6.0, a bit more in flower. If in soil, bump that up to 6.3-6.7 and keep it between the two. You appear to have a calcium deficiency, a support ticket would fill in the blanks and help us diagnose with more accuracy Deficiency doesn’t alway mean there’s none in there, sometimes it’s there but can’t be absorbed due to ph locking certain minerals out. Cal mag won’t hurt but it’s always best to identify the cause of such and only fix what’s needed.
3 Likes
I just saw your attachment, your in coco… What is your watering schedule? Coco needs multiple feeds a day, minimum of two.
4 Likes
So if I go to 6.8 let the problem resolve and keep an eye on the other chart “ you sent “ for
coco making sure to adjust to meet all the needs given we are in mid flower not worries about Nitrogen so much ?
Thank you so much for the help
1 Like
Sorry bad service …. 1x per day until runoff
2 Likes
@Low have a peak if you have a moment
3 Likes
potassium deficiency, crispy edges and spotting starting from the sides of the leaf. Given you’re running a Growers Choice ROI-E720 with under-canopy lighting, you’re pushing solid PPFD, which means that plant’s probably using up nutrients faster than normal, especially potassium during stretch or early flower. Your pH at 6.2 is right on the edge for coco or hydro potassium uptake starts to drop off around there. Ideally, you’d want to bring it down just a bit, more in the 5.8–6.0 range to stay in the sweet spot for K absorption.
Your nutrient stack looks strong with Louder Powder and the CYCO additives, but it’s worth double-checking how much total K is in your mix, especially if you’re leaning heavy on phosphorus or calcium… those can sometimes compete and lock out potassium. The molasses adds some good carbs for microbes if you’re running any..
3 Likes
Thanks @low glad you know the lineup. No tip or leaflet burns to indicate the spotting more as K this early
3 Likes
usually with potassium deficiency, you’d expect to see the edges start crisping up or the tips burning off before spotting like that sets in, especially this early in flower. But at the same time, not every deficiency shows up in a textbook way, especially when you’re running high-intensity lighting.. In high-demand environments, potassium issues can show up more subtly or in weird patterns, especially if there’s any kind of nutrient imbalance or slight salt buildup.. without that clear edge burn or tip damage, it could just as easily be an early calcium or magnesium issue starting to surface. Calcium tends to hit newer growth first, but in coco or hydro, it can get locked out easily if the pH drifts or if potassium or phosphorus is too high. Molasses and the additives OP is using might be contributing to some imbalance too. I’d probably lean toward dropping the pH just a bit, maybe down to 5.8. Possibly eliminating additives and sticking to the base nutrients. Uptake and availability which is generally in any foundation are readily available IF the medium is where is should be to maximize uptake in any given stage. Knowing the medium, and nutrients is important. Throwing things on the base feed more often than not causes problems vs “boosting,” which is a snake oil scheme in my opinion.
4 Likes
I do use Recharge every 7-10 days and Great White intermittently as well. So you recommend dropping the PH to 5.8-6.0, check total K values between all additives.
1 Like
IMO great white is for seedlings and recharge is for starving mothers, or “oopsies” when soil starts go without feed for a tad too long. It provides a quick kick of N (kelp extract,) fulvic to boost nitrogen uptake, carbs to feed microbial colony, and some additional microbes to get a bad soil environment back on track. Both of them can be used in soil, great white for seedlings and transplants. Recharge or mycos serve no place in a hydro environment, it defeats the purpose of having a soilless base. Soilless or hydro leave no role for microbes to perform. They are ONLY there to break down unavailable food sources for uptake:
I’d drop to 5.8-6.0. 6.0 is a sweet spot front to back.
1 Like