Greenhouse help please

[AdventurousJ]

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

 

[AdventurousJ]

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

 

[GrnMonStr]

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.

 

[AdventurousJ]

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.

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?

 

[GrnMonStr]

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.

 

[AdventurousJ]

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.

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?

 

[Farmer's Hat]

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.

 

[AdventurousJ]

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.

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