Greenhouse help please

I bought and installed a greenhouse a month ago. First time with a greenhouse , and first time having dedication to growing cannibas. I run a small barn fan 24/7. Lastnight I notices white mold/mildew on the ground so I poured some vingegar on it. It did nothing. The greenhouse condensates every morning, I have 1 vent open and leave the door half cracked. When I installed the greenhouse I washed the panels and inside, my water leaves white calcium scum and I left soap scum behind not thinking it was a big deal figures it would eventually condensate and on the ground (which it hasn't its still water stained unless it's mold forming)? Now leading up to my big question and stressful concern. This morning condensation fell from the ceiling onto my cannibas leaf I tried to shake it off but it stayed. 10 hrs later I arrived home from work and exactly where the water had fell it dried up and looks what appears to be white mold/ powdery mildew. Or is this nutes or salts? It looks just like white mildew...... can this form and appear that fast? Is the mildew on my floor evaporating and falling onto my plants? My plants are to big to take out of the greenhouse. Do I wipe and disinfect everything? How do I do this with my plants still in greenhouse? How do I remove the white mildew on the ground? I'm worried for my crop, I can't remove from greenhouse this is my cover from neighbors. Please I need top notch advice. Thanks

I need to solve this asap I am afraid of my plant getting moldy it's 3 weeks Into flower

I think I would chop all that grass out remove it, then add mulch. If I thought that was mold or powdery mildew I might try the milk and water solution in a sprayer. Then I would get a humidity gauge in there and an exhaust, and OR a dehumidifier. Oh and remove affected leaves.

GrnMonStr said:

I think I would chop all that grass out remove it, then add mulch. If I thought that was mold or powdery mildew I might try the milk and water solution in a sprayer. Then I would get a humidity gauge in there and an exhaust, and OR a dehumidifier. Oh and remove affected leaves.

Click to expand...

Thank you will do, I will start removing the grass. I sprayed more vinegar on the mildew looking spot in the greenhouse. Now I am concerned that the vinegar will condensate/percipate onto the ceiling then fall onto the plant and kill it. Should I not be using vinegar in my greenhouse since it's also a wees killer? Am I just asking for trouble?

Well I think the ratio is or at least what I just read was 2-3 tbsp to a gallon of water using apple cider type. I think you are on the right track you need to tackle it ASAP for sure and put in measures to control it, or at least try.....it can be challenging ......my first season in a cold frame myself sides rolled up 1/3 door open plus a small vent. I have no fans yet BUT this weekend I am buying a dehumidifier and a couple fans. And previously been spraying some of the milk solution one week, neem oil another, and recently I found a few of those small moth caterpillars on mine so I did some BT, one week and then Dead Bug another week. I am not budding yet still a few weeks away I think then I will add fine netting and stop all sprays.

GrnMonStr said:

Well I think the ratio is or at least what I just read was 2-3 tbsp to a gallon of water using apple cider type. I think you are on the right track you need to tackle it ASAP for sure and put in measures to control it, or at least try.....it can be challenging ......my first season in a cold frame myself sides rolled up 1/3 door open plus a small vent. I have no fans yet BUT this weekend I am buying a dehumidifier and a couple fans. And previously been spraying some of the milk solution one week, neem oil another, and recently I found a few of those small moth caterpillars on mine so I did some BT, one week and then Dead Bug another week. I am not budding yet still a few weeks away I think then I will add fine netting and stop all sprays.

Click to expand...

I am using cooking vinegar to try to tackle the ground mold, I will have to check the apple cider solution after this post. I'm glad to be talking to someone who's new with the greenhouse also maybe next year I'll get more fans I would like to have one pointed towards the top. My plants have white pistils and I have to say I used neem oil a week and half ago, it ended up burning all the pistils and even killing some new growth. Be careful with the neem. Also when I first put my fan in the greenhouse I had it blasting on my plants (non oscillating) 1 hot day and it dried half the plant out to brown crisp. They getting much better now. In the mornings is your ceiling soaked with water?

The white spot on the leaf looks like a hard water mark. Lots of calcium in most tap water.

The floor should be mulched with bark. It will help control the humidity. You need to control the humidity. An easy way to do this is by setting up a small portable dehumidifier inside the greenhouse, and have the run off water go outside. Also, set up two small oscillating fans inside the greenhouse so that there is no stagnant air. Stagnant air and humidity is a breeding ground for several types of mold.

How big is the greenhouse? Take a picture of the greenhouse from the outside.

Farmer's Hat said:

The white spot on the leaf looks like a hard water mark. Lots of calcium in most tap water.

The floor should be mulched with bark. It will help control the humidity. You need to control the humidity. An easy way to do this is by setting up a small portable dehumidifier inside the greenhouse, and have the run off water go outside. Also, set up two small oscillating fans inside the greenhouse so that there is no stagnant air. Stagnant air and humidity is a breeding ground for several types of mold.

How big is the greenhouse? Take a picture of the greenhouse from the outside.

Click to expand...

I ended up cutting the leaf because it scared me to much, and I am now reading that soap scum can get moldy (I left soapy water on inside panels while cleaning thinking maybe it would prevent bugs, a month ago) but maybe I am over thinking. The calcium build up would be a perfect reason I hope . Thanks for the replies.

10×8 greenhouse house the fan is pointing at the wall then bouncing air around. I had a issue with direct air it would windburn and dry out my plant

Nice all looks good so far! So you ever think about planting right in the ground? But I can see the benefits of being in a pot, like bringing it in over winter to re-veg maybe?

GrnMonStr said:

Nice all looks good so far! So you ever think about planting right in the ground? But I can see the benefits of being in a pot, like bringing it in over winter to re-veg maybe?

Click to expand...

Next year I will plant in the ground, do you think 2 plants in the ground would overfill this 6ft high greenhouse, its just my first year growing. Rookie lol. I have a question you seem educated on growing, myplants has a bunch if white pistils. I noticed spider mites and webs yesterday. So I sprayed my crops with Ally Crop Defender 3, it ended up making every pistil turn brown just about.. is this very bad? Will I be smoking old dead pistils now? What should I do?

Well, an organic pesticide like Captain Jacks Deadbug now might be a good time to do this. Or maybe just keep hosing the critters off. I don't think I would spray once buds are too far along so now might be a good time. I am no expert that's for sure just an average enthusiast. When I spray I wear respirator, Goggles, gloves long shirt and I feel guilty as heck; BUT I use organic ones not chemical ones so I think the risk is very low, and test say it is very safe BUT I cant say for sure.

I am in the ground in my cold frame just so I can have a better chance at maintaining happy plants from a potential dry pot and or over watering issues I think being in the ground has some benefits, If mine get too tall I start LST before that point or trim as needed. But being in a pot keeps it portable and that a plus possibly.

But yeah pistils going brown might concern me too.

GrnMonStr said:

Well, an organic pesticide like Captain Jacks Deadbug now might be a good time to do this. Or maybe just keep hosing the critters off. I don't think I would spray once buds are too far along so now might be a good time. I am no expert that's for sure just an average enthusiast. When I spray I wear respirator, Goggles, gloves long shirt and I feel guilty as heck; BUT I use organic ones not chemical ones so I think the risk is very low, and test say it is very safe BUT I cant say for sure.

I am in the ground in my cold frame just so I can have a better chance at maintaining happy plants from a potential dry pot and or over watering issues I think being in the ground has some benefits, If mine get too tall I start LST before that point or trim as needed. But being in a pot keeps it portable and that a plus possibly.

But yeah pistils going brown might concern me too.

Click to expand...

What size grow tent do you have? Do you have any pictures? I think the brown pistils are because I used the spray the night before a 3 day heat advisory of 90 plus weather. I just couldn't wait and should have. It even burned almost like it melted some leaves. It does say don't spray when over 90 degrees. I thought the night before would be okay but it was not. I think I sprayed early enough where things will work out and be fine. I pray anyway.

I have a cold frame its like a green house with sides that roll up about 4' along the long sides and its a pretty good size not huge not too small I could grow 12 plants with no issues with 7'+ head room in the center. I got some tomatoes, peppers along with Acapulco Gold, Cap Junky, Chocolope 256, and a few unknown Indica strains one has HUGE leaves. And today I just plucked a finger off that had about 25 small eggs like little balls. So I may spray soon I rotate with BT and Deadbug. But I try to go as long as possible without I just don't want a break out once budding starts. I know I get hit with those cabbage little green worms so yeah shit happens outdoors and we do our best we can.

That spary Ally Crop Defender 3 has oils in it I think I read and that may be part of the issue along with the hot weather. I stopped using my neem oil because of that, but I don't have hairs yet but the neem oil smell stay around too long so I only use it early on twice its been 3 weeks since I last used that.

I will try and post some picture in the next couple days.

This is three of the known strains I have growing. I planted a little later in the season just because I wanted to try and keep the size manageable since I don't need too much. But I do plan to let them go to seed and will only keeping the best male plant once that time comes. The cap Junky I am doing LST on just pulling the tops down so the shoots get more light. The others I am just letting them grow normal. I can grow 12 legally as far as I know but I am only doing 6 since I have some veggies mixed in and I want to keep good air flow.

GrnMonStr said:

This is three of the known strains I have growing. I planted a little later in the season just because I wanted to try and keep the size manageable since I don't need too much. But I do plan to let them go to seed and will only keeping the best male plant once that time comes. The cap Junky I am doing LST on just pulling the tops down so the shoots get more light. The others I am just letting them grow normal. I can grow 12 legally as far as I know but I am only doing 6 since I have some veggies mixed in and I want to keep good air flow.

Click to expand...

Thank you so much for the photos and the feedback! Your setup sounds very nice. Your plants look healthy and happy too!. I will be taking a good amount of your advise to improve my second grow.