onthe420train
New Member
How and how long does typical mj flower?
after a minimal 2 or 3 week vegetative growth stage following germinationmj takes 5-15 weeks typically to flower with indicas ranging from 5-9 and sativa is 9-14 skunks usually 7-11 hybrids are often optimized for 6-9 week a good 7-8 week range is pretty common.
mj is a 'short day plant' which means it is photosensitive and triggered by photo-periodic shifts in night cycle. when the days become short, the elongated dark periods cause hormonal build ups in the plant which forces flowering. mj's flowering is also accommodated by an increase in phosphorous and potassium although not to surpass nitrogen levels with phosphorous but potassium may get as high as 2 or 3x range however later for blasting extra buds a phosphorous boost may be used 3x nitrogen level or more to resignal flowering but this will kill older growth due to low nitrogen while bulking buds.
autoflowering plants flower under any light cycle and usually stay short like 18" to 20" tall when they are fully matured at 8 to 10 weeks from seed. these take 3 to 4 weeks fewer than the typical mj plant.
What kind of lighting needed how many watts it use?
ballasts use their rated wattage plus 15% so 600w + 90w = 690w on a 120v circuit is 690/120 = 5.75 amp
compact fluorescent (spiral), fluorescent (tubes), HID, LED, sunlight.
temp spectrum ranging 2,000K(HPS) 2,700-3,000K(flowering fluorescents or metal halides) 4,000-5,000k (not optimal) 6,500k(veg fluorescent or metal halide) 10,000k+ (aquarium deep sea simulation)
first few weeks 25-50w fluorescent per square foot should suffice for good veg. once taller under hid 50w HPS/sq ft of canopy will yield roughly 1 ounce per square foot in healthy environment.
How to choose what to use?
two things are important here what you are willing to spend and what you are comfortable using. hydroponics can get started for $50 up to thousands so if you are a budget grower look into diy dwc kits. also minimal nutrient line is general hydroponics grow bloom micro you can even use only bloom and micro you don't need the grow really and you'll be fine. that is minimal salts hydro so if you can pull that off the choice is up to you on what to use.
What should my ppm or ph be?
pH of feed or water solutions should be 5.8 to 6.5 in hydroponic applications and 6.5-7.0 in soil applications. pH should be checked and adjusted after adding nutrients and before watering crops.
the recommended ppm for your system can vary widely depending on what you are running but generally you can run an EC 0.5 to 1.0 for the first week and then up to 1.5 for the second and third weeks and somewhere around 1.8-2.0 when transitioning into bloom and 2.3 or 2.5 may be the peak of your schedule. aeroponics systems go higher and have higher consumption.
Where to buy?
420 sponsors, duh.
Ok, so GMB is boring, what else?
nutrients brands usually have lots of information on their websites so investigating there is the best idea. nutrients are really almost a personal choice as in how many components you want and how much you add but in reality a small amount goes a long way and a lot of manufacturers want you to use lots of product.
So what do I need for hydro?
a method and a medium - cleaned, rinsed, prepped and ready to grow
meters for ph and ec/tds
nutrients
seeds
light
location
ventilation and gas exchange
water
reservoir
pumps and lines
Problems with the atmosphere?
gas exchange/ ventilation via fans. cabinets look into axial fans. tents duct and inline fans centrifugal blowers are the best with speed controllers - tents should have few problems keeping humidity about 50%+ and temperature around 70-80F during lights on. harmful temperatures are regularly above 85 or 90 and no gas exchange will starve the plants without controlled added CO2. also wind simulates nature and builds stronger stem and branch systems also offers cooling benefits but can be harmful in too large of quantities. air circulation is as important as ventilation.
Discuss mediums?
soil and hydro are different
soil mediums are best composed of soil, worm castings, meals, perlite, humus, leonardite, dolomite lime, compost, sphagnum peat moss, coco, guano, etc.
hydro mediums are best composed of clay, rock, or fiber.
commonly used in hydro are clay hydro stones, rockwool fiber, coco fiber, perlite, verimiculite, rocks, 'sure to grow' and other plastics, and foam.
large gapped medium like hydro stones, perlite, and rocks are great for continuous or interval top feed systems. rockwools and coco fibers or soil less mixes are for intermittent watering. typically every several hours once roots are well established in coco or soil less mix, perlite or sure to grow. less often in rockwool or hydroponic mixes containing large amounts of peat moss.
cost wise plastics like sure to grow are at the top with rockwool and soil less mixes then premixed soils and reusable hydro stones or rocks and perlite are cheapest.
What composes a proper grow room?
you need to have temperatures stabilized with lights on in the range of 65 to 80F. reflectivity is helpful and the more air tight the better - line the room in plastic ofr air tight or mylar for reflectivity. fans for air circulation are necessary. if humidity is outside of the 40-70 comfort zone on a regular basis dehumidifiers or humidifiers would be ideal for preventing any issues like mildew or dryness, although in flowering humidity drops can be beneficial. other than that you need to be able to raise and lower and ideally move the light back and forth, arrange the containers, and have at least 5' from the floor to the light rails. at least 50w hid per square foot.
after a minimal 2 or 3 week vegetative growth stage following germinationmj takes 5-15 weeks typically to flower with indicas ranging from 5-9 and sativa is 9-14 skunks usually 7-11 hybrids are often optimized for 6-9 week a good 7-8 week range is pretty common.
mj is a 'short day plant' which means it is photosensitive and triggered by photo-periodic shifts in night cycle. when the days become short, the elongated dark periods cause hormonal build ups in the plant which forces flowering. mj's flowering is also accommodated by an increase in phosphorous and potassium although not to surpass nitrogen levels with phosphorous but potassium may get as high as 2 or 3x range however later for blasting extra buds a phosphorous boost may be used 3x nitrogen level or more to resignal flowering but this will kill older growth due to low nitrogen while bulking buds.
autoflowering plants flower under any light cycle and usually stay short like 18" to 20" tall when they are fully matured at 8 to 10 weeks from seed. these take 3 to 4 weeks fewer than the typical mj plant.
What kind of lighting needed how many watts it use?
ballasts use their rated wattage plus 15% so 600w + 90w = 690w on a 120v circuit is 690/120 = 5.75 amp
compact fluorescent (spiral), fluorescent (tubes), HID, LED, sunlight.
temp spectrum ranging 2,000K(HPS) 2,700-3,000K(flowering fluorescents or metal halides) 4,000-5,000k (not optimal) 6,500k(veg fluorescent or metal halide) 10,000k+ (aquarium deep sea simulation)
first few weeks 25-50w fluorescent per square foot should suffice for good veg. once taller under hid 50w HPS/sq ft of canopy will yield roughly 1 ounce per square foot in healthy environment.
How to choose what to use?
two things are important here what you are willing to spend and what you are comfortable using. hydroponics can get started for $50 up to thousands so if you are a budget grower look into diy dwc kits. also minimal nutrient line is general hydroponics grow bloom micro you can even use only bloom and micro you don't need the grow really and you'll be fine. that is minimal salts hydro so if you can pull that off the choice is up to you on what to use.
What should my ppm or ph be?
pH of feed or water solutions should be 5.8 to 6.5 in hydroponic applications and 6.5-7.0 in soil applications. pH should be checked and adjusted after adding nutrients and before watering crops.
the recommended ppm for your system can vary widely depending on what you are running but generally you can run an EC 0.5 to 1.0 for the first week and then up to 1.5 for the second and third weeks and somewhere around 1.8-2.0 when transitioning into bloom and 2.3 or 2.5 may be the peak of your schedule. aeroponics systems go higher and have higher consumption.
Where to buy?
420 sponsors, duh.
Ok, so GMB is boring, what else?
nutrients brands usually have lots of information on their websites so investigating there is the best idea. nutrients are really almost a personal choice as in how many components you want and how much you add but in reality a small amount goes a long way and a lot of manufacturers want you to use lots of product.
So what do I need for hydro?
a method and a medium - cleaned, rinsed, prepped and ready to grow
meters for ph and ec/tds
nutrients
seeds
light
location
ventilation and gas exchange
water
reservoir
pumps and lines
Problems with the atmosphere?
gas exchange/ ventilation via fans. cabinets look into axial fans. tents duct and inline fans centrifugal blowers are the best with speed controllers - tents should have few problems keeping humidity about 50%+ and temperature around 70-80F during lights on. harmful temperatures are regularly above 85 or 90 and no gas exchange will starve the plants without controlled added CO2. also wind simulates nature and builds stronger stem and branch systems also offers cooling benefits but can be harmful in too large of quantities. air circulation is as important as ventilation.
Discuss mediums?
soil and hydro are different
soil mediums are best composed of soil, worm castings, meals, perlite, humus, leonardite, dolomite lime, compost, sphagnum peat moss, coco, guano, etc.
hydro mediums are best composed of clay, rock, or fiber.
commonly used in hydro are clay hydro stones, rockwool fiber, coco fiber, perlite, verimiculite, rocks, 'sure to grow' and other plastics, and foam.
large gapped medium like hydro stones, perlite, and rocks are great for continuous or interval top feed systems. rockwools and coco fibers or soil less mixes are for intermittent watering. typically every several hours once roots are well established in coco or soil less mix, perlite or sure to grow. less often in rockwool or hydroponic mixes containing large amounts of peat moss.
cost wise plastics like sure to grow are at the top with rockwool and soil less mixes then premixed soils and reusable hydro stones or rocks and perlite are cheapest.
What composes a proper grow room?
you need to have temperatures stabilized with lights on in the range of 65 to 80F. reflectivity is helpful and the more air tight the better - line the room in plastic ofr air tight or mylar for reflectivity. fans for air circulation are necessary. if humidity is outside of the 40-70 comfort zone on a regular basis dehumidifiers or humidifiers would be ideal for preventing any issues like mildew or dryness, although in flowering humidity drops can be beneficial. other than that you need to be able to raise and lower and ideally move the light back and forth, arrange the containers, and have at least 5' from the floor to the light rails. at least 50w hid per square foot.
