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1st grow, I can’t get plants to handle more than 250PPFD

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    1st grow, I can’t get plants to handle more than 250PPFD

    Hello, 1st time grower here, and I too am looking for the voice of experience to help the girls plz . My plants are 6 weeks old, 15” tall, no problems, all healthy. I’m doing sea of green, 8 plants in grow tent doing hydroponics. I have 300w Mars-hydro SP-3000, Mars-Hydro suggests during veg keep light 18”-24”and I am at 20”. Here’s my dilemma: Lights are at approx 250 ppfd, and for vegetative I’ve heard they should be at 400-600 ppfd for vegetative and 600-900 ppfd for bloom, and I need to switch to bloom so I don’t outgrow my 2’x4’x7’ tent. Not sure how to quickly ramp up power without damaging the plants. If anyone how to proceed to get these plants up to speed. 73f 56% humidity. Through and at canopy . I have a apogee MQ-100 which I found out is PAR meter for everything but LEDs, so I’m exchanging it for M200 which works with LED lights, but the current gauge shows. On the M100, meter reading approx 200 ppfd at canopy. I’n at 15” and I need to transition from 18/6 to 12/12 asap. Help!!! I’ll send pics

    Hi infinity...I'm a relatively new grower having been in this hobby for a little over a year. Now in my fourth grow. I don't have any experience with light meters etc. I grow with an HLG Elite 360 light so I can't really comment on your light and the power it is producing. But, lots of others have experience with your light and I'm sure they will weigh in. I have seen lots of posts about turning the switch from veg to bloom and some say that they leave the light in the bloom setting the entire grow. You will see differences of opinion about the transition to 12/12, some say that you'll need a transition period, others simply say flip the switch. IMHO, just flip the switch when you are ready, you know, when your plants are about half as tall as you'd like their final height to be. You can control how the plants react to the light by the distance it is from the plant, without really worrying about the power, right? With LED's, they are not standardized, the most important number is the actual watts drawn at the wall. Just watch the tips on the leaves closest to the light and new growth for light burn. If your light is producing healthy plants I wouldn't change a thing.

    Example: Still trying to find the sweet spot with my light. Manufacturer says about 24" above the plant for flower and a 'little higher' for veg. I started this grow with the light on at full strength (its dimmable) 45" from the sprouts. I began to lower the light as the plants grew and now it is sitting at about 36" above the plants, no stretching or other issues either. I will eventually get it to the 24" for flower.

    Here's a quick LED light distance guide. Under 200w total power at least 12" above the plant, 200-300w at least 18" above the plant, 300+w 24-30" above the plant.
    Auto Tent: Gorilla 3x3x6, HLG Elite 360, Infinity 4" w/Carbon Filter, Autopot system, Mother Earth Coco 50/50 perlite, Granddaddy Purple x 2 (ILGM) 3-25-22
    12 oz flower jarred 6/23/22 w/ 3 oz larf

    Photo Tent: Gorilla 4x4x6 HLG Scorpion Rspect, Jetfan 6” w/Carbon Filter, Mother Earth Coco 50/50 perlite, Autopot system, Gold Leaf x 4 (ILGM) 3-25-22
    17 oz flower jarred 7/8/22 w/ 4 oz larf

    Nutrients: CX Horticulture - full line for both tents


      Well raise the light and make the switch. If you just have the veg light on you needed to be at full spectrum before the switch.
      Smoke Ganja create Peace Respect Nature don't trash the Planet

      Soil grower with coco/perlite mixed in
      indoor/outdoor grower
      1 36"x36"x66" tent- Viparspectra P2500
      1 3x3x6 tent- used in late spring for seedlings both veggies & weed. I have 2 viparspectar 450r for that tent.
      I use a t-5 & 54watt CFL for seedlings
      Sometimes i use plastic sometimes i use fabric grow containers
      Currently using fish/guano during veg growth & FF Grow Big 6-4-4 teens to bloom. Once i see pre-flower i switch to
      Age Old Organics Bloom 5-10-5


        "I have a apogee MQ-100 which I found out is PAR meter for everything but LEDs, so I’m exchanging it for M200 which works with LED lights, but the current gauge shows. On the M100, meter reading approx 200 ppfd at canopy"

        Why are you using a meter not rated for led's and assuming that it is correct.....surprised no one mentioned this...


        • Tersky
          Tersky commented
          Editing a comment
          Xena i hear ya, i dont know how often i will be back or if i might have to take another break as it looks like l may have to put my dog down in the very near future and i will probably not be a very nice person as i turn my pain into anger as a defense mechanism. I already have found my tolerance to bs is almost nonexistent

        • Xena
          Xena commented
          Editing a comment
          Tersky I’m truly sorry to hear about your furry friend. When I lost my last one, I told my wife no more, it took her almost 10 years to talk me into another one. I don’t like most people but I love my dogs and it’s like losing a family member. So I really am sorry to hear that.

        • golfnrl
          golfnrl commented
          Editing a comment
          Tersky, very sorry to hear about your dog. We had to put our beloved dog down on Thanksgiving (U.S.) a couple of years ago. I cried like a baby.

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