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Hey bud! This is what I call a "Big risk, Low reward" situation, but that's only if I am understanding correctly. You spraying a nutrient, not a pesticide or fungicide? Stuff like Bio-Sulphur, Spinosad and Potassium Bicarbonate is to curb mold spores, also known to be the least harmful out of all products to spray during flower, so spraying that stuff in a situation where you feel or know you may have mold pressure during flower will make a lot more sense than doing foliar feed during that time, it may mean more harm than good so it's a bit counterintuitive if there's not significant improvement but big margin for error. This is actually the more important part here, this needs to be the other way around, you gotta wait for lights to go off before spraying anything. You can damage your plants even during veg when doing this. There's quite a long list of reasons why and I'd love to explain, but I can go on for days about this so I'll leave it up to you, if you want me to explain I'm open I agree with Evan, once you got loads of hairs you stop any spray. It's not the as much the RH that's the problem, though it's definitly a problem too, it's more about the stuff inside whatever you spray. Spraying clean water during flower can be a problem, because of RH, especially late flower when the buds have internal moisture, but once you mix stuff into that water it doubles the risk, because even the stuff that's safe to spray during flower will burn the crap out those pistils if you mixed it juuuuuust a little too strong or spray at the wrong time Some people spray bio-sulpher or spinosad during flower, even late flower, without problems, but then you really gotta know what you doing when you gotta spray, how much as dosage and and and..... though with all that said you definitly wana keep your RH more constant and lower during flower, even if you not spraying anything. 30% ideal RH in flower. IPM is a big must, for every grower in every situation, foliar feed is just extras, but even with IPM -something that MUST be done weekly- as soon as you switch to 12/12 you gotta step back. you must give 7 days between foliar treatments - so lets say you switch to 12/12 today you can do your last full dose spray, next week you'll see one or two pistils here and there when you IPM you do a 50 to 70% recommended dose, another week later if all goes well you'll have pompoms forming and you should spray anything less than 50% dose. 3 weeks into flower you'll have full pompoms and first swelling of calyxes, this is where it becomes dangerous to spray anything and it's completely up you, the general consensus is to not spray anything beyond that point, so if you do and something goes wrong you gotta take it on yourself and remind yourself no one told you to do it and that the rule of thumb is to not do it

@pj3d People have foliar sprayed out of desperation deep into flower. So, it's really more of a situational thing. In general, I'd say once you have hairs as you describe, foliar spray should cease even with a dehumidifier. The main concern is of course fungus and mildew. The spores require regular bumps in humidity to grow. You would rather opt for a regular, more consistent and stable low humidity going into full flower.

Is it a wise idea to foliar spray flowering plants if I have a dehumidifier? My plants are 3 weeks in flowering and have loads of hairs just wondering when to stop foliar spraying the plants? I spray a hour or so after the lights turn on. Thanks for the Help

Hi there fellow mystics, Thought I would share this handy app; Supergreenlab (Google Playstore Link) I've been using it for almost 3 months now and found it to be a big time-saver for me. If you are like me and don't have the time to sit and create a database for you grows and need to document the data, then this app would probably be of interest to you. I don't have automated environmental controls, but even if you do, you can integrate this app with your system (depending what setup you are running) Me I use the manual way - You create your lab (or grow space) and then add each plant to that created lab (I have 5 labs for example Outdoor, Veg, Flower, Dry and Cure and between 3 to 8 plants listed in each.) It keeps track of life events, various training methods, watering and nutrient schedules and an image grow log - where you snap images directly into your plants database and you can scroll every plants life like a Facebook page almost. Indicating 4 weeks and 3 days ago, last watering 1 day 4 hrs ago for example. You can also add your own tools in the toolbox, for example the breeders name and the link to the seed bank you got it from. These guys also have a YouTube channel by the same name where they do some indoor growing, if you wanted to know more about these guys. For me the convenience of opening the app, tapping the plant and having all the info of what I've done ready right there to simply thumb down and see what we last did here is super. Just a Note: You can also update what you've already done by uploading images and setting dates for images and actions. You can make your grow log public or scroll and browse other grow logs from there. I just use it to keep track of which plant is where and likes what and how much. So, I hope this resource is as handy for you as it is for me. Happy growing fellow mystics.