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Still dealing with issues, and the problem is now with two plants.
-Problem: Strawberry Cheesecake still eating lower fans, all leaves still seem a bit light in color to me, some showing signs of deficiency, maybe calcium and/or magnesium. CDLC cross is starting to lighten a few lower fans, and some leaves show signs of deficiency, again maybe calcium and/or magnesium.
-Medium/grow method: SS#4, plus ~30% perlite in most of pot, plus ~50% in the autopot flood zone in the ~5cm or so in the bottom of the pot.
-Feed and supplements used: MC version two, BE, yucca, fulvic.
-Water source: Melted snow, EC ~30-40 (likely lower of late)
-Strain and age: Seedsman Auto Strawberry Cheesecake and Mephisto Genetics CDLCx3Bog cross, both now at day 54.
-Climate: Temps controlled at ~24C (max ~28, min. ~21) day and night, RH almost always between 40 and 55%, with brief excursions to either side.
- Light used: Diy screw in array, mix of 5000K and 2700K, currently at ~ 350watts total for ~9 sq ft, ~34" or so from top of canopy of the two problem plants. Previously ~ 450 watts but reduced lately.
-Additional info: Issues with the Strawberry Cheesecake have been going on for a while. The history is as follows:
- gradual increase of nutes from ~360EC to ~750EC by day 35. pH started at ~6.5, and was at 6.2 by day 35. The nute mix was primarily MC with cal mag accounting for ~20% of final EC. A bit of fulvic and kelp was added to the mix later. I saw hints of mag deficiency, hence the cal mag.
- By Day 38, the plant was showing light green new growth, and light green lower fans. Given the relatively low EC input, I suspected a lockout caused by nute imbalance/overfeed, or soil pH issues, so I flushed with multiple volumes of pH'ed nute mix to get the medium into spec. PH of the runoff was fine, I thought, at ~2.3 which was pretty much the same as input, but EC was >1450, far higher than input. I figured that I needed to get the EC down, but did not want to overdo it at once, so I flushed to ~950EC, and then did a final fertigation with fresh mix at that strength. The new mix was ~55EC Cal Mag, 600 EC MC, 220 EC BE (flowering now well started), 35EC kelp, fulvic, and yucca, mixed in ~40EC water. Once this was top watered in, the plant was left to dry out.
- Mix since this first flush was ~950EC, pH varied deliberately between 6.25 and 6.4.
- By day 47, the colour of new growth had not improved, and she was still eating lower fans. To make matters even more confusing, I saw initial signs of nute burn on this plant and the CDLC on the same reservoir. I suspected that she was locked out from being overfed instead of underfed which might otherwise account for eating the lower fans. Absent contrary advice, I flushed her again, and took the mix down to ~750 EC, all MC with a bit of BE.
- since the second flush there has been negligible improvement, she is still eating lower fans, most fans look light colored to me, and some fans look like they are suffering from specific deficiency, perhaps calcium, magnesium. or both.
History of the CDLC cross is the same except that she didn't show obvious symptoms of nute problems until recently, and she was flushed only once at Day 47. The flush was pre-emptive to make sure that she was not being hit too hard with high EC. She took only about half the nute mix to bring runoff into spec, but as was the case with the Strawberry Cheesecake, initial runoff was a lot higher than nute input. It now appears to me that CDLC is just starting to chew on her fans, and further, that some fans are showing signs of possible calcium and/or magnesium deficiency just like the Strawberry Cheesecake, only a bit later.
My reading of all this is now that the two older plants may be hungry, not overfed. They have been at ~700 EC or so since the last flush. This is only 350 ppm, a fraction of what many growers here use. Even the previous high of ~900EC (450ppm) was still low by general standards.
Any help would be appreciated. Absent other suggestions, I will likely try higher EC nutes on the two problem plants, and maybe the Northern lights, but irrigate the cbd mom manually at current EC levels of ~700EC (350ppm) until she shows signs of needing more.
Photos follow.
Seedsman Strawberry Cheesecake Auto:
a few of her lower fans:
The CDLC cross:
And a few of the problem fans:
Yeah, I know that the CDLC looks over or underwatered. I chased that for a while and concluded it is genetics, not watering. She has been growing fine in spite of the droopy leaves, so I gave up trying to fix it.
-Problem: Strawberry Cheesecake still eating lower fans, all leaves still seem a bit light in color to me, some showing signs of deficiency, maybe calcium and/or magnesium. CDLC cross is starting to lighten a few lower fans, and some leaves show signs of deficiency, again maybe calcium and/or magnesium.
-Medium/grow method: SS#4, plus ~30% perlite in most of pot, plus ~50% in the autopot flood zone in the ~5cm or so in the bottom of the pot.
-Feed and supplements used: MC version two, BE, yucca, fulvic.
-Water source: Melted snow, EC ~30-40 (likely lower of late)
-Strain and age: Seedsman Auto Strawberry Cheesecake and Mephisto Genetics CDLCx3Bog cross, both now at day 54.
-Climate: Temps controlled at ~24C (max ~28, min. ~21) day and night, RH almost always between 40 and 55%, with brief excursions to either side.
- Light used: Diy screw in array, mix of 5000K and 2700K, currently at ~ 350watts total for ~9 sq ft, ~34" or so from top of canopy of the two problem plants. Previously ~ 450 watts but reduced lately.
-Additional info: Issues with the Strawberry Cheesecake have been going on for a while. The history is as follows:
- gradual increase of nutes from ~360EC to ~750EC by day 35. pH started at ~6.5, and was at 6.2 by day 35. The nute mix was primarily MC with cal mag accounting for ~20% of final EC. A bit of fulvic and kelp was added to the mix later. I saw hints of mag deficiency, hence the cal mag.
- By Day 38, the plant was showing light green new growth, and light green lower fans. Given the relatively low EC input, I suspected a lockout caused by nute imbalance/overfeed, or soil pH issues, so I flushed with multiple volumes of pH'ed nute mix to get the medium into spec. PH of the runoff was fine, I thought, at ~2.3 which was pretty much the same as input, but EC was >1450, far higher than input. I figured that I needed to get the EC down, but did not want to overdo it at once, so I flushed to ~950EC, and then did a final fertigation with fresh mix at that strength. The new mix was ~55EC Cal Mag, 600 EC MC, 220 EC BE (flowering now well started), 35EC kelp, fulvic, and yucca, mixed in ~40EC water. Once this was top watered in, the plant was left to dry out.
- Mix since this first flush was ~950EC, pH varied deliberately between 6.25 and 6.4.
- By day 47, the colour of new growth had not improved, and she was still eating lower fans. To make matters even more confusing, I saw initial signs of nute burn on this plant and the CDLC on the same reservoir. I suspected that she was locked out from being overfed instead of underfed which might otherwise account for eating the lower fans. Absent contrary advice, I flushed her again, and took the mix down to ~750 EC, all MC with a bit of BE.
- since the second flush there has been negligible improvement, she is still eating lower fans, most fans look light colored to me, and some fans look like they are suffering from specific deficiency, perhaps calcium, magnesium. or both.
History of the CDLC cross is the same except that she didn't show obvious symptoms of nute problems until recently, and she was flushed only once at Day 47. The flush was pre-emptive to make sure that she was not being hit too hard with high EC. She took only about half the nute mix to bring runoff into spec, but as was the case with the Strawberry Cheesecake, initial runoff was a lot higher than nute input. It now appears to me that CDLC is just starting to chew on her fans, and further, that some fans are showing signs of possible calcium and/or magnesium deficiency just like the Strawberry Cheesecake, only a bit later.
My reading of all this is now that the two older plants may be hungry, not overfed. They have been at ~700 EC or so since the last flush. This is only 350 ppm, a fraction of what many growers here use. Even the previous high of ~900EC (450ppm) was still low by general standards.
Any help would be appreciated. Absent other suggestions, I will likely try higher EC nutes on the two problem plants, and maybe the Northern lights, but irrigate the cbd mom manually at current EC levels of ~700EC (350ppm) until she shows signs of needing more.
Photos follow.
Seedsman Strawberry Cheesecake Auto:
a few of her lower fans:
The CDLC cross:
And a few of the problem fans:
Yeah, I know that the CDLC looks over or underwatered. I chased that for a while and concluded it is genetics, not watering. She has been growing fine in spite of the droopy leaves, so I gave up trying to fix it.
Bit of a pain in the butt, but not as bad as the various conversion factors with ppm.
