Warehouse grow. Help please!

Hey guys. I have not been on here for a long while because I stopped growing for a time. I have started again and now it is in a warehouse. There are several issues that I need help on.

Firstly, let me give a quick summary of my setup.

There are 250 plants under 60x 1k hps lights. The strain is PPP. The lights were flipped on Christmas day. After approximately 2 months of vegetation. They are in 35 liter pots, filled with soil. 3000 sq ft WH. Since it is winter, we do not need much cooling so we only have 2x 8" inline fans pumping air in and 2 more taking air out. (Likely not enough fresh air/ventilation but any more and the room will get too cold. Gets to 10c @ lights off without any fans running.)

We had a mite issue but it has been kept under control by use of lots of fans. Also a powdery mildew issue recently arose. So I will be fighting that by spraying them all down with a baking soda and dish detergent mix.

The things I need help with are the following:

How can I bring my humidity down? It is 80-90%. -I was told not to use carbon filters when humid because they lose efficiency. Which means smell will soon become an issue.

Also, we triggered to flower about 20 days ago now. We have 250 very large plants (about 5 feet high from pot and just as wide) so we had planned to add more lights (plan was to have 2 plants per light for optimal yield for maximum electrical usage). If we add more lights this week would it make a significant increase to our yield? : Is adding another 60x 1k lights to our grow at day 20 of flowering worth it?

Looking forward to your replies!

Thanks,
-J

PS: I might add pictures in a bit.

Get some preditory bugs for the mites and some dehumidifiers with bilge pumps. I like ladybugs because their cheap. Seriously get that humidity down. Thats whats causing the pm and itll cause more problems eventually too.

dont u guys have 10 50 pint dehumidifiers in there?

a mongo frog said:

dont u guys have 10 50 pint dehumidifiers in there?

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We do not have any currently. I am planning on picking up two of the largest walmart has.

Alienwidow said:

Get some preditory bugs for the mites and some dehumidifiers with bilge pumps. I like ladybugs because their cheap. Seriously get that humidity down. Thats whats causing the pm and itll cause more problems eventually too.

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Hey Alien. I know of lady bugs too but for spider mites on mother sized plants? I don't know how effective they will be.

What was your experience using them? How many did you purchase for what size of an op?

Amazon, like 10 bucks for 1500 of em, its cheaper than anything really. Ya gotta sweep more but whateve. Get what two jugs of mighty wash costs and see what you like better. Those dehus will slow the pm but speed up the mites.

What I'm having a hard time understanding is why the hell would you grow 250 plants in a warehouse with 60 lights and ask these amature questions?

if you have money to burn, just buy herb.

Give me some pics, Ill give some advice

I would love to see someone taking 250 8 Gallon pots into a warehouse with 2000 Gallons of soil.

Take it you must be working with a team full of people? or...

240 Watts on each plant of HPS seems a bit excessive if you really are growing on such a scale.... Why not throw another 250 plants in there?... Wasting your electricity.

How are you powering it all? generators ?

If you have equally spread out 250 plants over 3000 square foot, thats 12 Square foot a plant.... and 50 Sqaure foot a bulb... Your bulbs will be very inefficient if this really is the area your growing in.

Personally, If I was to do this, I would use a much smaller place for that amount of plants, I would use less lights, lower watts and keep them closer together.

In what country is this? must be US with 10celcius on a night time without any heating?

In a warehouse in the uk in winter with no heating, plants would be good as dead in a matter of days below freezing point at night.

from the way everything is described and how far everything will be spread out, you will probably lose money on the set up costs and electricity depending on your yield... (If you are actually paying for the electric) Like $4-5 a day for a 1000W bulb? so $300 a day on electric.... $200 each HPS setup maybe, $12,000 just for the light setups.

apprx $11,000 a month to grow if you split the setup costs between the months you will be growing for and add up electric costs..

3 months down and total cost will have been $33,000 ?

lets say you go for another 3 months and raise total to nearly $70,000

Not to mention if you are using generators, the quality and amount of them you will need... the noise must be chaotic.

Realistically, your spending about $100,000 for this grow???]


If you were growing in a good space, less spread out, didnt have 1 plant every 12Sqft and a bulb covering every 50 sqft(How you have basically explained it), I would say you would profit well.

This sounds like a disaster waiting to happen guys, just sayin. You dont have temperature control either? Sounds like you guys put the cart before the horse for this grow. Ahh well, good luck and keep the check book handy

I was hoping for a conclusion to this story. "We are using fans for mite control" huh?

And no dehu... and NO aircon. Nice.

Protip.. once you have PM it is INSIDE THE PLANT. NO AMOUNT OF SPRAYS IS GOING TO KILL IT UNLESS YOU STEP UP TO AG GRADE SYSTEMICS... and poison the people who smoke it.

Please tell me you didn't set all this up with the hope that a 3000sqft warehouse with 250 plants would only need 2 in-line fan sets, 2 8inch fans would not even drop the temps inside that warehouse by half a degree...
10 Celsius is WAY to fucking low for you to have a successful grow even inside a warehouse, your inviting all types of fungus and no wonder the PM issue...

can't you dived the flower room in 2 so half the lights run at night and half during the day

try growing 3ft foot plants and tninn out the canopy will reduce the humidty loads, also helps to control the mites as they like thick deep canopy