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I'm not ruling that out. Purely conjecture but I wonder if all these new strains genetics are as stable as the old-school strains? At any rate, I'm going to get a soil probe and not rely on runoff. Probably seems silly but I hadn't checked for soil probes in years. All I found were the cheapo...

I'll order one. Do you recommend the Bluelab or the Apera? The bluelab requires a pre-made hole and I assume the mode of action is for some amount of solution to enter the glass tube of the probe to get a reading? With the Apera the spear is the probe.

Here is a Zskittlez at about 4 and a half weeks. It looks frostier in the pic than it does in person, but you can see the growth doesn't look great and pistils already turning. I don't have Purple Punch the same age but it was looking normal and more frosty at it's halfway point. Here is...

I misspoke in the OP. My lamps can provide 1000 PPFD across the canopy but I hang them a little high. I designed them myself and have an Apogee sensor to test with. I use resistors to regulate the output. New plants get 500-600 PPFD, then mid flower with no resistors. I could use resistors to...

Yea, I was treating it more like soil but it does look like I need to keep the PH at 6.2 or less the whole cycle. As far as CO2, 850 is about where the yield curve transitions past 45 degrees (diminishing returns). I'm not opposed to running it higher but I used to get 50-70 g/sqft in hydro...

Yes, I'll get some pics up this evening when lights are on.

I grow my own with an aeroponic cloner. I usually get 95-100% success rate. The Purple Punch does not like to root from cuttings, lucky to get +50% but it does really well once it gets in the flower chamber.

I've wondered that too, seed variability or something. The Blueberry Cookies I tried with two different seeds/moms, same results. The Zkittlez just one seed so far. I didn't mention but the first time it happened was with GSC, not as bad as the other two but same gist, low trichomes and bushy...

All clones.

Of all these: - cal-mag seems to be an obvious upgrade. - I can try lowering the feed PH to 6.6-6.7 but 6.2 would lower the in medium PH too much I suspect. Might directly address the issue. These might be overall helpful but I don't suspect they go to the root of the problem: -I can add a...

I asked my AI buddy. Here is his response: 1. Nutrient Imbalance or Deficiency Potassium (K): Trichome production and resin synthesis rely heavily on potassium during flowering. While Pure Blend Pro Bloom is a quality nutrient, it may not supply enough potassium for some strains, particularly...

Thinking back, the first plant this happened with was GSC. I use tap water but ppm is low at 70. I'm wondering if some strains are more sensitive to cal-mag deficiencies. It's something to try.

Fairly new to soilless but long time grower. Currently in a sealed room, 74 degrees, 1000 PPFD, 850 ppm CO2, 50% RH. Some strains (AK47, Purple Punch, Gelato and a few others) do fine. Other strains (Blueberry Cookies, and now Zkittlez) produce almost no trichomes. I'm using Pro-Mix HPCC...

Par is a measure of photons in the 400-700nm range. PAR is not weighted but the McCree curve shows plants will take and use whatever they can get. I digitized the McCree curve years ago for 5 different spectrums at the same wattage and when the curve was applied it modified the numbers but not...

Seems XHP360 is a knockoff. I got excited for a minute. The XHP70.3 HI is kind of exciting though.

I'm seeing flashlights with "XHP360". Tried to look them up on cree.com but nothing. Are these Cree products that are only being made available to Chinese flashlight producers? A Chinese knockoff using Cree's nomenclature?

My moms were suffering from low PH, which seems to be an issue with reed sedge peat based mixes. I was feeding at 6.5 and plants would start to yellow after 6-8 weeks. I tested the run off (note below) and measured PH under 5. My first solution was to do a flush and then feed and "cycle the...

Apologies if I wasn't clear, I'm switching from hydro to a soilless mix (pro mix HPCC). If I feed the soilless mix at 6.5 the PH of the mix will drop below 5 in 4-6 weeks. That's why I mentioned feeding at PH 7 which seems to keep the PH stable so far. I've been doing my moms in soilless mix for...

Long time hydro grower, wanting to perpetual in soilless media. I'm phrasing the question as the differences because I've kept my mothers this way for a long time and learned to keep them healthy. I limit the feed to about once a week at 500-600 ppm and PH to 6.9-7. I was PHing to 6.5 but would...

I've get tips bleaching when running LEDs a little too close. Heat has never been an issue, though of course there are other factors accounted for. I have used pin fins passively cooled on my lamp builds for years, but they are oversized. 150mm sinks for 45w output. But I still have some 200...