B 52

Please tell more about your lighting during the bloom, also growing medium? Fertilizer may not be your obstacle.

I use 1000 watts... its a small room. I have a hard time regulating the temperature with the room being in a garage that gets very hot and cold. I use soil mixed with perlite and vermiculite.During bloom i usually use the bloom A&B . 12 hour lighting. Yields are very small.

Starting to see into it more, how close do you keep the light to the canopy and is it a LED lamp or traditional? Also what line of nutes are you using and are you experiencing heavy burns? A standalone a/c would be on my list for your garage. That will help but there may be a couple small obstacles beyond. What is your avg. ph runoff?

its the traditional lighting.... i keep the lights approx 1 foot above the tallest plant. Some batches I get a lot of burned leaves the heat can go up past 90f. I keep the door open to cool it down some, while the lights are on. I run my ph around 6.4. I use nutri plus bloom a and b. Unfortunately I have no ventilation area for a a/c.

Well that's just too bad about the a/c. Temp control indoors is quite relevant. I would suggest several cheap box fans placed around the plants. It sounds like your an ace with the ph, as 6.4 is close to perfect. I would say the light is much too close however, an hps @ 1000 w, I would put 70-80 inches from the canopy. Its very possible your yields are low due to light shock. Also I cant find a specific npk # for your fert, but I wouldn't attribute burned leaves to the heat. The heat would cause the leaves to at first droop quite drastically then slowly die afterward and it would generally affect the entire plant. Burns occur because of nutrient overload. Burns are a good sign as it means the plant has a good appetite. Still we try to avoid burning our plants as it can ultimately reduce yields. I don't know if your using regular photo seeds or autos? But I would suggest you use 1/4 strength of the entire line from now on as I'm highly suspecting nute burn. Doing that then yes, I would feel ok applying B52 booster from weeks 3-6. Also its good to open the door when you can to allow a fresh exchange of c02 into the room. What sized containers are you using? What strains are you growing?

Thank you for all the info you are giving me I really appreciate..Can the plants take several fans in the room? I will put the light up higher. I always felt the heat from the bulb would burn the plants. But i was told to high it would just stretch them. I will back off a bit on the nutrients. I usually give it for 2 waters then flush next. The plants are in a 20 Liter pail. I have white widow,blue berry cush, and alphgan.

Nice strains. Cup winners. Yes the plants can handle the fans just add a fan at a time as the plant gets bigger. Also consider a new bulb if your lamp is 3 years in. Your welcome for any help I offer. I enjoy gardening so much I don't even think of it as work at all. It can be like putting a puzzle together at times. Not all the pieces fit just right at first. Got to keep moving them and trying new things.

the lights are getting old. It's my next replacement. I'm always nervous changing things around just in case I ruin the batch. Time to change.

Yes making changes during a grow is not fun. Especially light failure. I always try and have everything ready before the seeds pop. To say a bit about stretching, consider why your plants in your situation would stretch. Plants grown under hps stretch more. Plants grown in an atmosphere above 80 degrees stretch more, and plants that are genetically to grow taller will stretch more. Suggesting the box fans would cool the plants and also cause microscopic tears , called infinitesimal tears. These heal up very quickly and cause the plants to grow thicker and stronger and help slow down vertical growth.Proper pruning will also slow down vertical growth.