I have hydro tent working with one 65 watt 5000k cfl and one 24 watt t5. I am put the 18/6 of light right now it's been 6 days some look good some look bad. The temp stays between 79 to 89 and i have dome lid on there so the humidity stay at 80 to 90 percent. I spray them down every two days or so when they start to look dry. I use distilled water. I have some in a tray under the dome so that the humidity stay up. There medium are rapid rooters. Some look good others not so well. If anyone has any ideas of what I might be doing wrong or what they did and can give me some pointers. Here are some picture Am I not letting in enough air? Am I over watering? Do I need to start add nutrients.
Seedling Problems
- Thread starter twbef111
- Start date
Blaze Master
Well-Known Member
you might want to get the lights closer, there is alot of streaching going on
gotigers0420
Active Member
too hot too wet and not enough light.
*BUDS
Well-Known Member
Why are they in a dome? the dome is causing this with super high rh for the seedlings. No.
Temp75-80 rh 40-50.
Flash4211
Active Member
I'm in my first grow, and have made many newbie mistakes. One of them was this: If you are using distilled or RO water, you have 0 calcium and 0 magnesium (most tap water already has these elements in it). Plants need these. Now, the general rule of thumb is never to feed your young seedlings. But my seedlings were limp, had yellow spots, and were generally sickly until I gave them a very light dose of CalMag (1/4 of normal) on the advice of an experienced RIU member. They perked up in about 24 hours. Do some reading and most importantly listen to the growers here with experience. It looks to me like several of your seedlings can be saved. Good luck and hang in there!
bowlfullofbliss
Well-Known Member
The stretched ones are easily saved.....cut a pellet in half, then split the half down the middle, and gently put the stretched seedling in the new pellet, and stack it. No biggie at all. I highly suggest using clonex as a feeding for all clone cuttings and it's going wonders for my new seeds I just cracked. I have a 98% success rate doing the same thing. Distilled water sucks too.....I use straight well water, ph balanced. I gave them a shot of the clonex yesterday, and every one of them, all the same size as yours, have a new set of leaves already grown overnight.
found this on the net
The humidity in the enviroment is the amount of water vapor present in the air. Most growers know that humidity in excess of 85% percent increases the probability of the appearance of bud mold. The humidity is also critical during germanation when the seedlings are extremely fragile. Humidty should be kept over 80% at this stage in the plants life to prevent the soil from drying too fast. Experimentation has shown that a relative humidity of 65% to 80% increases growth rate. Below this level the plants develop extremely narrow and tissue paper thin leaves to try to prevent excess loss of water. Above 80% relative humidity the plant have trouble disposing of toxic chemicals through evaporation.
[h=5]Temperture[/h] Cannabis can survive tempertures from 32 degrees F to over 100 degrees F. Cannabis will grow best with a temperture of 70 to 75 degrees F day and night. Higher than 90 degrees F the enzymes within the plant begin to breakdown and photosynthesis is affected. The same is true for low tempertures.
The humidity in the enviroment is the amount of water vapor present in the air. Most growers know that humidity in excess of 85% percent increases the probability of the appearance of bud mold. The humidity is also critical during germanation when the seedlings are extremely fragile. Humidty should be kept over 80% at this stage in the plants life to prevent the soil from drying too fast. Experimentation has shown that a relative humidity of 65% to 80% increases growth rate. Below this level the plants develop extremely narrow and tissue paper thin leaves to try to prevent excess loss of water. Above 80% relative humidity the plant have trouble disposing of toxic chemicals through evaporation.
[h=5]Temperture[/h] Cannabis can survive tempertures from 32 degrees F to over 100 degrees F. Cannabis will grow best with a temperture of 70 to 75 degrees F day and night. Higher than 90 degrees F the enzymes within the plant begin to breakdown and photosynthesis is affected. The same is true for low tempertures.
Sadly enough I am in the middle of the city and they pump city water full of stuff the ph on the water that comes out is like 8.5. So CalMag 1/4 light does on my seedlings. Sounds risky but I will try it out in a spray bottle and see how one does first. I left the rapid rooter up to check the root structure of the long stemmed one's and there root structure is looking very well. very white almost ready to transplant in about another week or so long white coming out the sides and bottom of the rapid rooter about an inch to half inch all around. so the long stemmed one's are just fine it's the short ones I am worried about but I will try the calmag out and post about how it works. So now I have taken the dome off moved the lights closer about 3 inches away from the tops of the tallest. I am spraying with distilled water two to three times a day as the rapid rooter gets dry witch is happening more now since there is a lower humidity. If any one has any more thoughts or idea's please shar them with me
The humidity in the enviroment is the amount of water vapor present in the air. Most growers know that humidity in excess of 85% percent increases the probability of the appearance of bud mold. The humidity is also critical during germanation when the seedlings are extremely fragile. Humidty should be kept over 80% at this stage in the plants life to prevent the soil from drying too fast. Experimentation has shown that a relative humidity of 65% to 80% increases growth rate. Below this level the plants develop extremely narrow and tissue paper thin leaves to try to prevent excess loss of water. Above 80% relative humidity the plant have trouble disposing of toxic chemicals through evaporation.
Temperture
Cannabis can survive tempertures from 32 degrees F to over 100 degrees F. Cannabis will grow best with a temperture of 70 to 75 degrees F day and night. Higher than 90 degrees F the enzymes within the plant begin to breakdown and photosynthesis is affected. The same is true for low tempertures.I also found this on the net
Optimal Temperature:
Between 70 - 85 degrees Fahrenheit (21 - 29 degrees Celsius).
Optimal Humidity:
60 - 70% rH for vegetative growth.
40 - 60% rH during flowering (lower rH helps to reduce the risk of fungal contamination on your already moist dank buds).
80 - 90% rH for rooting clones and cuttings (high humidity is a must as these new plants may not have roots to draw moisture through).
More Details and Commentary:
Night temperatures should be kept above 60 degrees to prevent stress. It is preferable during flowering to have a night temperature drop of 10-20 degrees to stimulate flowering hormones and reduce stem elongation.
If you are supplementing your grow space with additional carbon dioxide (CO2), your target daytime temperature should be between 80 - 90 degrees (F), until the last two weeks of flowering when daytime temps should be kept about 10 degrees lower and CO2 can be reduced to adjust for the lower metabolic rate of the mature plant.
While one should always make an effort to maintain temperatures below 85 degrees (F), cannabis can handle higher temperatures and you're probably not going to ruin your crop if your grow room peaks in the mid to upper 90's during the day. Just make sure that you maintain excellent air circulation to prevent the heat from building up in hot spots and burning your plant more than necessary. Placing a fan in line with the top of your canopy and blowing toward your light can help prevent excess burning during peak temperatures. If you do notice serious burn occurring on the tops of your plant, you're going to have to either add more ventilation to your grow room, an air conditioner,or just move your plants farther away from the light.
If low humidity is a problem, you can mist your plants during the cloning and vegetative growth stages, but you should refrain from misting during flowering as it can surely encourage fungal growth! There are also humidifiers available for purchase, or you can place a large dish of moist perlite in your grow space to help transpire more moisture into the air. When using perlite, it should not be swimming in water, and it would be advised to mix a dilute solution of hydrogen peroxide in with the water each time you moisten it, in order to help prevent mold growth. If this isn't enough, you may need to fully dry the perlite on occasion, which can be accomplished by spreading it onto a foil lined baking dish and placing it in the oven for a while.
Low humidity (below 60% during vegetative growth or below 40% during flowering) can stress plants. However,some growers swear by lowering the humidity as much as possible during the last several days of flowering, as this may promote increased resin production by the plant as it attempts to prevent excess moisture loss by sealing itself off from the dry surrounding environment with the good THC-packed sticky stuff.
Temperture
Cannabis can survive tempertures from 32 degrees F to over 100 degrees F. Cannabis will grow best with a temperture of 70 to 75 degrees F day and night. Higher than 90 degrees F the enzymes within the plant begin to breakdown and photosynthesis is affected. The same is true for low tempertures.I also found this on the net
Optimal Temperature:
Between 70 - 85 degrees Fahrenheit (21 - 29 degrees Celsius).
Optimal Humidity:
60 - 70% rH for vegetative growth.
40 - 60% rH during flowering (lower rH helps to reduce the risk of fungal contamination on your already moist dank buds).
80 - 90% rH for rooting clones and cuttings (high humidity is a must as these new plants may not have roots to draw moisture through).
More Details and Commentary:
Night temperatures should be kept above 60 degrees to prevent stress. It is preferable during flowering to have a night temperature drop of 10-20 degrees to stimulate flowering hormones and reduce stem elongation.
If you are supplementing your grow space with additional carbon dioxide (CO2), your target daytime temperature should be between 80 - 90 degrees (F), until the last two weeks of flowering when daytime temps should be kept about 10 degrees lower and CO2 can be reduced to adjust for the lower metabolic rate of the mature plant.
While one should always make an effort to maintain temperatures below 85 degrees (F), cannabis can handle higher temperatures and you're probably not going to ruin your crop if your grow room peaks in the mid to upper 90's during the day. Just make sure that you maintain excellent air circulation to prevent the heat from building up in hot spots and burning your plant more than necessary. Placing a fan in line with the top of your canopy and blowing toward your light can help prevent excess burning during peak temperatures. If you do notice serious burn occurring on the tops of your plant, you're going to have to either add more ventilation to your grow room, an air conditioner,or just move your plants farther away from the light.
If low humidity is a problem, you can mist your plants during the cloning and vegetative growth stages, but you should refrain from misting during flowering as it can surely encourage fungal growth! There are also humidifiers available for purchase, or you can place a large dish of moist perlite in your grow space to help transpire more moisture into the air. When using perlite, it should not be swimming in water, and it would be advised to mix a dilute solution of hydrogen peroxide in with the water each time you moisten it, in order to help prevent mold growth. If this isn't enough, you may need to fully dry the perlite on occasion, which can be accomplished by spreading it onto a foil lined baking dish and placing it in the oven for a while.
Low humidity (below 60% during vegetative growth or below 40% during flowering) can stress plants. However,some growers swear by lowering the humidity as much as possible during the last several days of flowering, as this may promote increased resin production by the plant as it attempts to prevent excess moisture loss by sealing itself off from the dry surrounding environment with the good THC-packed sticky stuff.
I am not cloning yet I am working from seeds. why would I stack them like that other then to brace them so they won't fall but there fine right now and developing a an extensive root system. Do you really think the stretched ones are in trouble at all. if so how? and would I use clonex on seedlings? have you used clonex on seedlings