Kingrow1
Well-Known Member
Thanks bro, 5 years too late though
T5's need help!
- Thread starter Kingrow1
- Start date
Kingrow1
Well-Known Member
About that but thats as close as my seedlings can get atm.
U can get closer with a intake and exhaust on low power
Kingrow1
Well-Known Member
If you need to get this close i suggest you invest in a brighter light!
puffer1958
Member
Kingrow, did you flower with HID after you vegged with T5 or did you finish with T5 as well? If you used T5 until the end, how did you feel about your results? I just watched a YT video and he used T5 for the whole grow and his Master Kush looked damn good to me. I have HID, T5 and LED but this is just my second grow and my first RDWC/DWC grows(I am vegging in a DWC and flowering in an RDWC). In other words I am as green as cannabis with too much nitrogen when it comes to growing but I have been smoking for 40+years. Anyhow, I sure appreciate any knowledge that you can inflict on a brother. Many thanks in advance.
Runbho
Well-Known Member
This is definitely a weird problem. Do you have your thermometer prob at canopy level so you're getting an accurate reading. Something is off here. I have the exact same setup, have seedlings with only their first set of leaves and I have my HO t5's 3 inches from them. I have a 2x4 tent and a 4ft t5 fixture. Even with a fan blowing across them, temps were reaching 80 degrees. I added a duct fan and now I'm maintaining 71-75 degrees throughout the day. That seedling is definitely stretched and I can assure you that moving the light farther away will only cause if to stretch more. It's stretching because it's reaching for the light. My best guess is your ambient temps are too high or your not getting an accurate temp. Add an exhaust fan and you'll be able to place your light closer.
MichiganMedGrower
Well-Known Member
I tend to keep sprouting and young seedlings about 10" from the t5 tubes and acclimate them over a week or two to be at 6" to 8" for veg. Least stress and best growth and health for me.
Of course this is plant and environment specific. But it is not just heat but intensity that stresses plants.
What you have seen sounds right to me from my set ups and experience. 6" to 12" range.
And just level out the plants with stands. Mine are all different sizes and stages so I have to.
Of course this is plant and environment specific. But it is not just heat but intensity that stresses plants.
What you have seen sounds right to me from my set ups and experience. 6" to 12" range.
And just level out the plants with stands. Mine are all different sizes and stages so I have to.
BBbubblegum
Well-Known Member
T5s work really well between 2-6 inches away. Anything after a foot seems to cause stretching atleast in my experience. Owned a 2'x4 bulb 96w T5HO and a 4'x8 bulb 432w
mauricem00
Well-Known Member
I think a lot of that depends on the spectrum and intensity your running. at 2-4 inches development of top buds slow down but lower buds do well on my plants.in my grow closet 8- 12 inches works best but i' running a mix of 6500k and P@A bulbs. using a 4ft 6 bulb fixture in a 2ft by 4 ft by 8ft closet. it may be strain dependent as well.
whitebb2727
Well-Known Member
Yes. I keep mine about 24 inches when sprouting and then lower them. I'm in flower right now and have my t5 about 12 inches away.
A couple inches away will flat fry them.
whitebb2727
Well-Known Member
This is a 2x4x6 cab. You can see the distance I run my t5. It is a 4ft 8 bulb unit. The bulbs are double stacked so it fits 8 bulbs in the same space as most 4 bulb fixtures.
No stretching.
No stretching.
mauricem00
Well-Known Member
I grew 3 clones in my patio under real sunlight and they had an inter nodal distance a little under 3 inches. too much stretching is an indication of poor spectrum. what do you consider to be a proper amount of stretching. I have seen videos of some plants that looked more like industrial hemp. when HPS lights were placed too far away
Kingrow1
Well-Known Member
My plants are a little stretched in the pictures above but not by much. Too many are scared and keep them far too short in my opinion.
Kingrow1
Well-Known Member
If you want a short plant buy a short strain dont force a tall plant to be short with lights as that will be stressfull.
At about a foot tall id expect to be on my fith node after 3/4 weeks veg so minus the stem im looking at around two inches distance between each of the five nodes to achieve that.
At about a foot tall id expect to be on my fith node after 3/4 weeks veg so minus the stem im looking at around two inches distance between each of the five nodes to achieve that.
OldMedUser
Well-Known Member
High Kinggrow1
I would suggest you start your sprouts under 6500K CFLs. The seedling in that first pic is wayyyy too stretched out. As soon as my beans pop up they are under just one 23W CFL if just a few and never stretch like that. Once they have 2 or 3 sets of true leaves then they will do fine under the T5s.
Check out the new T5s Hortilux makes now. Would be great for peeps that want to do the whole grow under them.
I would suggest you start your sprouts under 6500K CFLs. The seedling in that first pic is wayyyy too stretched out. As soon as my beans pop up they are under just one 23W CFL if just a few and never stretch like that. Once they have 2 or 3 sets of true leaves then they will do fine under the T5s.
Check out the new T5s Hortilux makes now. Would be great for peeps that want to do the whole grow under them.
Kingrow1
Well-Known Member
I made this thread in October 2011 so just over five years ago, its been dragged up a couple of times now. Im still using the exact same t5 lightwave 96watt unit from five years ago too, as in the first post.High Kinggrow1
I would suggest you start your sprouts under 6500K CFLs. The seedling in that first pic is wayyyy too stretched out. As soon as my beans pop up they are under just one 23W CFL if just a few and never stretch like that. Once they have 2 or 3 sets of true leaves then they will do fine under the T5s.
Check out the new T5s Hortilux makes now. Would be great for peeps that want to do the whole grow under them.
View attachment 3816716
I think your seedlings look far too short, had or have some minor issues and tinfoil is not for growrooms. I like a seedling to grow big leaves and reach out for the light.
OldMedUser
Well-Known Member
Got to wear my reading glasses so I can see the date on the posts.
Nothing wrong with tinfoil and CFLs. Don't get hot spots from CFLs and most light shades are just real thick tinfoil anyways. Aluminum foil actually.
Those seedlings were 10 days old in that pic. Look at 'em from 10 min ago.
They're really liking the move to the grow room and sitting under the 400W MH. I rigged that hood up with a mogul socket in the other end and now have a 150W HPS in there too to add some colour and a few more lumens.
Nothing wrong with tinfoil and CFLs. Don't get hot spots from CFLs and most light shades are just real thick tinfoil anyways. Aluminum foil actually.
Those seedlings were 10 days old in that pic. Look at 'em from 10 min ago.
They're really liking the move to the grow room and sitting under the 400W MH. I rigged that hood up with a mogul socket in the other end and now have a 150W HPS in there too to add some colour and a few more lumens.