New to greenhouse growing please help

Bossman1 · Apr 18, 2025

Hello all
Just finished the greenhouse and come mothers day all my plants will be going outside couple of things does anyone use cannabis companion plants like marigold inside with the plants and who uses good insects like prayin mantis and or ladybugs or do most people stick with spraying with some type of insecticide
Thanks for reading and for any advice

Gmix · Apr 18, 2025

the comp plants are something I’d suggest

It’s been a long time since I refreshed my memory on outside prevention however I’m sure there’s a lot of different types of plants and stuff
( the stuff has faded away sry to say )

There a faded memory of cinnamon or peppermint infusion with bark chips I’m can’t remember it exactly

Good bugs are useful however they need a constant food supply to stay

Oldchucky · Apr 18, 2025

I haven’t seen the moth yet that will refuse to lay eggs on a weed plant because it has a marigold growing next to it! But I guess it can’t hurt! Nice set up you have there! Knock it out of the park! hope you have a decent climate and a long season! And welcome aboard!

Bossman1 · Apr 18, 2025

lol thanks.

Oldchucky said:
I haven’t seen the moth yet that will refuse to lay eggs on a weed plant because it has a marigold growing next to it! But I guess it can’t hurt! Nice set up you have there! Knock it out of the park! hope you have a decent climate and a long season! And welcome aboard!

lol thanks

Bossman1 · Apr 19, 2025

No one else can chime in ???

Bossman1 · Apr 21, 2025

Nobody uses good bugs in there greenhouse ?

RoadKillSkunkHunt · Apr 21, 2025

Bossman1 said:
No one else can chime in ???

I can chime in ...

Bossman1 said:
Nobody uses good bugs in there greenhouse ?

I haven't used ladybugs or any kind of "good bugs" in my greenhouse. I've had some leaf hoppers who take a bite and leave but never any infestation issue with any kind of bug inside my greenhouse.

What is the climate in the area you are in? My biggest challenge growing in a more northern location has been fighting bud rot. What happens in my area is around the first of September, the nights drop below dew point every night. Plants are wet in the morning. This occurs even inside of greenhouses unless you have the latest hi-tech climate control professional style greenhouse to keep the humidity down. There's a few ways to combat it to some extent but no matter what, how well you do will depend on mother nature.

The other thing that stands out is I see no active ventilation. Have you considered that? You need both air exchange through the greenhouse as well as active airflow inside it. I have an intake air fan, an exhaust air fan and 4 oscillating fans inside my 10' x 20' greenhouse.

How many square feet is your greenhouse?

Bossman1 · Apr 22, 2025

I have it set up so I can put an oscillating fan in each corner there are 2 roof vents that have the automatic opener when it gets to hot I was planning on hanging a 6 inch duct fan and have it exhaust out of one of the roof vents and I built a screen for the door so u can keep it open if need be
I live on Long Island so the September months are quite damp at night I was thinking of a dehumidifier ?? Would that work ?? The greenhouse is only 8x12
Please any advice all my plants are doing so well in the basement kinda worried about screwing things up by bringing them outside

Oldchucky · Apr 22, 2025

Bossman1 said:
I have it set up so I can put an oscillating fan in each corner there are 2 roof vents that have the automatic opener when it gets to hot I was planning on hanging a 6 inch duct fan and have it exhaust out of one of the roof vents and I built a screen for the door so u can keep it open if need be
I live on Long Island so the September months are quite damp at night I was thinking of a dehumidifier ?? Would that work ?? The greenhouse is only 8x12
Please any advice all my plants are doing so well in the basement kinda worried about screwing things up by bringing them outside

I know that Long Island is pretty temperate in the summer! But I’ll bet that greenhouse will be pushing 120° on an 85° day there if it’s nice and sunny! I bet it’s pretty warm in there now on a sunny day! Only one way to find out and then try and adapt to it! And in my opinion, it’s still too early to be bringing photos outdoors permanently! But autos you could give it a whirl! Just two cents! and there is a maniac named,Cbrian here that has been trying to make his greenhouse work that is similar to your! If you search his name, you can come up with his chaotic gardening thread!!

JIMKSI64 · Apr 22, 2025

Ok if there is one recommendation I can make is go ahead and get companions and predators but ensure you get a sulphur smoker and learn how to use it safely.
You have an enclosed greenhouse which is important as the sulphur squirters do not really work as designed. Having a smoker gives you a nuclear option to kill every insect and most pathogens without killing your plants. It leaves a high pH residue for days that continues to kill bugs. Imo a smoker should come with a greenhouse.

My chime. Love the greenhouse. I had ideas on a greenhouse but instead I am getting a kitchen upgrade which is fine I cook more then I grow.

Bossman1 · Apr 22, 2025

JIMKSI64 said:
Ok if there is one recommendation I can make is go ahead and get companions and predators but ensure you get a sulphur smoker and learn how to use it safely.
You have an enclosed greenhouse which is important as the sulphur squirters do not really work as designed. Having a smoker gives you a nuclear option to kill every insect and most pathogens without killing your plants. It leaves a high pH residue for days that continues to kill bugs. Imo a smoker should come with a greenhouse.

My chime. Love the greenhouse. I had ideas on a greenhouse but instead I am getting a kitchen upgrade which is fine I cook more then I grow.

Lmao

Bossman1 · Apr 22, 2025

I’m gonna look up sulphur smokers thank you

RoadKillSkunkHunt · Apr 22, 2025

Bossman1 said:
I have it set up so I can put an oscillating fan in each corner there are 2 roof vents that have the automatic opener when it gets to hot I was planning on hanging a 6 inch duct fan and have it exhaust out of one of the roof vents and I built a screen for the door so u can keep it open if need be
I live on Long Island so the September months are quite damp at night I was thinking of a dehumidifier ?? Would that work ?? The greenhouse is only 8x12
Please any advice all my plants are doing so well in the basement kinda worried about screwing things up by bringing them outside

Unfortunately, I don't think passive air flow through the greenhouse will be sufficient to keep things cool enough. I'm using 2 attic fans on a temperature controller in my greenhouse to move the air through it. The oscillating fans will only do so much. Your screened door will provide some relief but I don't think it will keep the heat down enough ... but I could be wrong about that. Dehumidifier - Your greenhouse likely isn't air tight enough for a dehumidifier to do much more than run up your electric bill. Essentially, you'll be trying to dehumidify the whole Long Island area.

Last, it looks like you have 15 plants or more ready to go in that space. That's too many. Your greenhouse at 8' x 12' is 96 ft square. Mine is 10' x 20' - 200 ft square. One time, I tried to grow a dozen plants in there. By fall, it was a jungle and I could not walk down the center of the greenhouse without damaging the plants.

I'm in Michigan. The night time temperatures from September on makes it difficult to grow good outdoor weed. On the other hand, I have zero issues growing inside where I can control all aspects of the environment. I spent my first year attempting photos in the ground. My second year, I ran fast flowering plants in fabric pots in the ground .... the last several years, I ran auto-flowers which I had my best luck with, but I still ended up dealing with some bud rot on my second summer run. I ran autos started indoors in April, moved them to the greenhouse in May and then started another round. I got 24 plants through it in 2 different runs but anything not finished after labor day ended up with bud rot.

My question for you is can you keep some of those plants in their fabric pots and grow them in the open air? You will actually have less humidity issues out in the open than you will inside your greenhouse. Next, I suggest you either dust off your battery powered leaf blower or buy one if you don't already have one. You'll need it come fall to dry off your plants EVERY morning.

This year, I'm running tomatoes and peppers only in my greenhouse ... no cannabis.

Oldchucky · Apr 22, 2025

RoadKillSkunkHunt said:
Unfortunately, I don't think passive air flow through the greenhouse will be sufficient to keep things cool enough. I'm using 2 attic fans on a temperature controller in my greenhouse to move the air through it. The oscillating fans will only do so much. Your screened door will provide some relief but I don't think it will keep the heat down enough ... but I could be wrong about that. Dehumidifier - Your greenhouse likely isn't air tight enough for a dehumidifier to do much more than run up your electric bill. Essentially, you'll be trying to dehumidify the whole Long Island area.

Last, it looks like you have 15 plants or more ready to go in that space. That's too many. Your greenhouse at 8' x 12' is 96 ft square. Mine is 10' x 20' - 200 ft square. One time, I tried to grow a dozen plants in there. By fall, it was a jungle and I could not walk down the center of the greenhouse without damaging the plants.

I'm in Michigan. The night time temperatures from September on makes it difficult to grow good outdoor weed. On the other hand, I have zero issues growing inside where I can control all aspects of the environment. I spent my first year attempting photos in the ground. My second year, I ran fast flowering plants in fabric pots in the ground .... the last several years, I ran auto-flowers which I had my best luck with, but I still ended up dealing with some bud rot on my second summer run. I ran autos started indoors in April, moved them to the greenhouse in May and then started another round. I got 24 plants through it in 2 different runs but anything not finished after labor day ended up with bud rot.

My question for you is can you keep some of those plants in their fabric pots and grow them in the open air? You will actually have less humidity issues out in the open than you will inside your greenhouse. Next, I suggest you either dust off your battery powered leaf blower or buy one if you don't already have one. You'll need it come fall to dry off your plants EVERY morning.

This year, I'm running tomatoes and peppers only in my greenhouse ... no cannabis.

A lot of times greenhouses aren’t the panacea that they seemed to be! And there is a lot of pressure to make them work to justify the expenditure! Especially when it comes to family harmony!

Bossman1 · Apr 22, 2025

RoadKillSkunkHunt said:
Unfortunately, I don't think passive air flow through the greenhouse will be sufficient to keep things cool enough. I'm using 2 attic fans on a temperature controller in my greenhouse to move the air through it. The oscillating fans will only do so much. Your screened door will provide some relief but I don't think it will keep the heat down enough ... but I could be wrong about that. Dehumidifier - Your greenhouse likely isn't air tight enough for a dehumidifier to do much more than run up your electric bill. Essentially, you'll be trying to dehumidify the whole Long Island area.

Last, it looks like you have 15 plants or more ready to go in that space. That's too many. Your greenhouse at 8' x 12' is 96 ft square. Mine is 10' x 20' - 200 ft square. One time, I tried to grow a dozen plants in there. By fall, it was a jungle and I could not walk down the center of the greenhouse without damaging the plants.

I'm in Michigan. The night time temperatures from September on makes it difficult to grow good outdoor weed. On the other hand, I have zero issues growing inside where I can control all aspects of the environment. I spent my first year attempting photos in the ground. My second year, I ran fast flowering plants in fabric pots in the ground .... the last several years, I ran auto-flowers which I had my best luck with, but I still ended up dealing with some bud rot on my second summer run. I ran autos started indoors in April, moved them to the greenhouse in May and then started another round. I got 24 plants through it in 2 different runs but anything not finished after labor day ended up with bud rot.

My question for you is can you keep some of those plants in their fabric pots and grow them in the open air? You will actually have less humidity issues out in the open than you will inside your greenhouse. Next, I suggest you either dust off your battery powered leaf blower or buy one if you don't already have one. You'll need it come fall to dry off your plants EVERY morning.

This year, I'm running tomatoes and peppers only in my greenhouse ... no cannabis.

Thanks for the feedback I truly appreciate it I’m hoping to have these through flower before the fall hits but we will see

Bossman1 · Apr 22, 2025

Oldchucky said:
A lot of times greenhouses aren’t the panacea that they seemed to be! And there is a lot of pressure to make them work to justify the expenditure! Especially when it comes to family harmony!

Lol

Bossman1 · Apr 22, 2025

I’m as stubborn as they come I’m gonna try and make this work if all else fails back to the basement !!

Glomus · Apr 22, 2025

Just use avid

RoadKillSkunkHunt · Apr 22, 2025

Bossman1 said:
Thanks for the feedback I truly appreciate it I’m hoping to have these through flower before the fall hits but we will see

What are the cultivars you're growing? If you're running autoflowers, you'll be ok. You need 14 hrs of darkness to trigger flowering in a photoperiod plant. For me where I am at, that doesn't happen until the middle of August. Where you're at probably isn't significantly different. That puts an 8 week cultivar out to middle of October. That means 6 weeks of dealing with temperatures in the dew point at night. This is what makes growing in northern areas difficult.

Bossman1 · Apr 22, 2025

Right now I’m on an 18/6 schedule so if I put them out on Mother’s Day I’m kinda hoping they go into flower

New to greenhouse growing please help

New to greenhouse growing please help

Bossman1

Attachments

Gmix

Oldchucky

Bossman1

Bossman1

Bossman1

RoadKillSkunkHunt

Bossman1

Oldchucky

JIMKSI64

Bossman1

Bossman1

RoadKillSkunkHunt

Oldchucky

Bossman1

Bossman1

Bossman1

Glomus

RoadKillSkunkHunt

Bossman1

Privacy & Transparency

Privacy & Transparency