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Alright guys, I've been picking away at this damn build for almost 5 months now. I have finally have it up and running, software and everything. So this is basically a cheap automated DIY 4x CXB3590 system, driving at 1050mA. Goals * Steady-state operation within specified thermal bounds *...

I've been playing around with a new method of cloning that (at least for me) has had a 100% success rate so far (1 exception, this cut of rosemary i tried to clone from a sick plant, this might also not work with woody plants). I've had a high fail rate with other methods i was trying, so I...

Was pretty happy with how this turned out in the end, gonna share it here even though its the jankiest jank possible. I bought a few meters of some LED grow-light under-lighting strips. The same stuff you're most likely to see for under-lighting at your local bar or whatnot, but with the 4:1...

So, I've been fumbling around with this new COB project for a bit, slowly collecting pieces here and there. I've got a bunch of CXB3590s with mounting and reflectors, have been lazily trying to figure out mounting and stuff (with basically 0 tools for working with metal). I eventually found...

Alright guys, it's been a few months of me running around here talking about 'low P', dishing out the theories and research I've been tracking, etc. Finally wanted to post some results. I'm about 2 weeks from harvest, and 90% of this grow so far has been on a custom low P high N diet the entire...

Found this on r/hydro. Show off your new state pride with: Full gallery: http://imgur.com/gallery/PVYte reddit post: https://www.reddit.com/r/hydro/comments/5apcjw/built_a_windowsill_nft_hydroponics_system_let_me/

1950s book from berkley, one of the first official publications on hydroponics. Also describes the the https://en.wikipedia.org/wiki/Hoagland_solution which... basically is just what all the nutrient solutions are today, some variation of it. also, i guess its 'nutriculture', not hydroponics...

Just spotted a unique sighting- plant losing turgor pressure during lights on. I've been torturing my plants the last few weeks with some intense rez issues- have flushed and replaced maybe 4 times in the last 10-12 days, fighting some intense ph/precipitate issues. The plants have been having...

I've been running on a really low ppm diet for a while, just started seeing this on the leaves today. Any idea what it is? Kind of a blotted/muddled light patch on older growth. Guessing it's an N thing, but it doesnt look like the pictures. any thoughts? details: DWC light GH trio 1m:1g:1b...

Trying to settle on a new nutrient schedule for this grow, getting bored/confused/frustrated already. The full gamut. I just noticed today my printout GH schedule doesn't even sorta match the schedule on the back of the trio bottles. Plus the growweedeasy reduced schedule also doesnt seem to...

Running a DWC setup, plants just touched down a day or so ago and now the leaves look different... They're on week 2 total (end of week 1 in the system), the roots just touched the water recently, and im running GH trio, at about 300ppm total, 1/2 strength seedling strength (1.3ml/gal m/g/b)...

I was able to successfully post an animated gif here I hosted on imgur: https://www.rollitup.org/t/time-lapse-teaser.920471/ I've yet to be able to do it again, no matter what type/size of animated gif i try on imgur anymore, i get an error icon: Are there certain restrictions on gifs?

Has been two weeks since i reset the grow. The last attempt ended in failure, so with a few modifications this grow was sure to succeed (i hope). (more setup info from the first grow found here: https://www.rollitup.org/t/software-engineer-grows-weed-pt-1.916235/) Seeds: * 3x feminized...

This was a totally unnecessary, but fun addition to this new grown attempt. I got a cheap $20 Webcam that works with the my grow computer i have set up for my DWC system. Details about most of it are in the link in my sig, but ill be starting a new grow journal soon. Not much content so far...

I've seen the same "googleable" 2 or 3 posters around, but I've also seen some people post some wayyyy better ones before. Unfortunately I can't find those posts anymore! We should cobble together some of the best leaf diagnosis charts here, maybe a poll? I know some of them suck or just aren't...

I germinated and sprouted (?) my new seeds about 8 days ago. I have 4 healthy seedlings that are just starting their second set of 'true' leaves. When should I toss these bad girls into the RDWC system? I've got timed drippers (15m every 1.5 or 2 hrs) so im confident the rockwool will stay...

I'm looking into getting drinking water delivered for my hydro setup. Found a great place around here that offers 88 ppm water, with a pretty good mineral mix. The other place I was looking at offers about 8 ppm! That's wayyy to low. The place with 88 pm that im looking at is drinking water, so...

So, I got what was supposed to be 3 Blue Dream clones of the same pheno. This transaction was pretty bad from the start, I got mites.... but im over that now. So, they're bigger and healthier but.... wtf is different about the plant on the right? Definitely doesnt look like the same genetics as...

So, I bought some clones from denver, 4 of the same pheno, already had to fight the mite infestation it brought.... Now that they're bigger.... they do not even look like the same strain. It's supposed to be Blue Dream (a sativa dominant). But I swear I only see one sativa looking plant. Am I...

Is anybody aware of some sort of effect that CO2 may have on humidity? I just noticed something from my sensor plots today... my CO2 solenoid got disconnected for a second and CO2 injection wasnt happening... and I saw my RH rise 10%. Anybody know what's that about?