New CFL Grow

[Fastass419]

Did you get that mars light? I would it will be great for you tent. How close was that light? I would worry about the heat off of it. You room is a little warm I think but I'm no expert but at 30.5°c seems warm to me. Plants look good

 

[Rollincoal]

I will be getting the light on tuesday, the lights now are about 8-10” above the plant and ya the temp in my tent went high once i raised this cheaper led light which kinda makes no sense. The one thing that i am not sure of is the black spots that the one plant has, and how its colouring, but reading a bunch of stuff and i think its a boron problem i checked my ph in my soil and its high so not to sure how to Treat this but i am thinking a flush with straight ro water or maybe an up root to new soil

 

[Fastass419]

I wouldn't flush maybe better soil but how did you ph your soil if it's one of them probs dont believe it those things are junk it always says my ph in my soil is light. I think the brown spots are the light. Most problems with soil would start with bottom leaves not top. Top leaves make me think light is to close. I would be at least 14"

 

[Rollincoal]

ok i am not to sure on the light thing anymore after the lights came back on i noticed more of the spots and my other plant has lower leaves starting to yellow, and yes i used a probe

 

[Rollincoal]

But i will try to put on better pics when i get off this rig, tired of being here

 

[Rollincoal]

Ok got some photos for you. fastass419 you mentioned better media i use pro mix hp high porosity with mycorrhizae. Is this a soilless media? If so i am growing way wrong including wrong pots and would this explain my new issues. Started beginning of the week and has got worse. I know what your thinking ( stupid newbie ) lol and this would all be lack of nutes and probably heat stress as that cheap led made my tent brutal hot. I also noticed tonight that the cord for my led was on the wrong side of my timer (always on) so went from 19/5 to 24 of light let me know what you think, you guys can laugh i got big shoulders

 

[Fastass419]

Hey nobody is laughing we all have problems I'm no expert by far I'm still a rookie. I still say your light is the problem but let me see if I can get you some help to see what they think. Hey @PCaddict, @MrSauga what you guys think

 

[Rollincoal]

Thanks,

 

[Rollincoal]

The yellowing is on a different plant just to clarify that

 

[Backlipslide]

I also got in HP promix mycrohymazia or how ever it’s spelt.. I also grow using that medium.

yes it is considered a soiless medium.

that light has a driver on it. You can remove the driver outside of the tent to cool off your tent. You should also have adequate airflow in the tent as well. Do you have that?

 

[Rollincoal]

No my one fan quit another is on its way, at the moment i opened the 8” top vent to allow heat out and placed a 8” fan at the bottom intake to move extra air around and basically presureize the tent, to force heat out. Is a crude way of doing it but is getting me by till my fan gets here. Just kinda blew me away when these isues showed up they were doing really good.

 

[Backlipslide]

With the first tent I built. That’s how I created a negative pressure in my tent. Except I had a fan at the extraction point, flipped upside down, drawing air out. With fresh air being sucked into the tent. A good negative air pressure is what your looking for in your tent, as well as a fan inside pushing air around as well.

two was almost too much, so I removed the one fan, and tapped with tuck tape around the edges of the fan creating a solid seal for the fan to push air out. It actually working amazing. This will help your heat, as more air is being pushed out rather then more air being brought in, with minimal air being pushed out.

 

[Rollincoal]

I do have a fan blowing air around, ( i would get pics but its night time for them ) i will have a 4” with a filter hopefully tomorrow, to extract air as well as keeping the other bringing air in. The 4” moves 290cfm which is way bigger then my tent so should work good with that 8” pushing air in.

 

[Backlipslide]

Yes that should work. When you say an 8” fan pushing in is it an in-line fan or just a small fan like the ones in my picture? I didn’t realize you had an in-line fan and carbon filter on the way. That’s great!

 

[Fastass419]

So how are the plants doing?

 

[Rollincoal]

Well i checked in on them this morning temp was getting high again so i opened up another vent, lights should be on in about an hour i am trying a little longer rest. After i realized they went from 19/5 to 24hrs so i was late lastnight gave the a good drink of full nutes was the first one checked run off was 5.8 so a bit low, and now they are gonna have a light cycle of 17/7. So in about an hour lights will be on and i can have a boo. Will have some pics up soon

 

[Rollincoal]

Well definitely not going forward ? I really wanna say its a boron problem. First pic is of my green crack and second pic is blueberry

 

[Rollincoal]

Not sure what to do here this would have started with the first time i gave them any nutes as well about a week ago, might just do a straight tap water flush and flush the shit out of them

 

[Backlipslide]

Looks to me like a phosphorus deficiency to me

Adjust pH to Correct Range
Your cannabis plant may show signs of a phosphorus deficiency if the pH at the roots is not in the right range. That is because when the pH of your root zone is off, your cannabis cannot properly absorb phosphorus through its roots. Therefore the first step is to ensure that you have the correct pH for your growth medium.

Phosphorus is best absorbed by cannabis in soil at a root pH of 6.2 – 7.0. Phosphorus is best absorbed by cannabis in hydro at a root pH of 5.5 – 6.2. If you believe you have a cannabis phosphorus deficiency, it’s important to check the pH of your root zone to make sure the deficiency isn’t caused by the pH being too high or too low.

If you suspect your growing cannabis plant has a phosphorus deficiency, flush your system with clean, pH’d water that contains a regular dose of cannabis-friendly nutrients that includes phosphorus. This will remove any nutrient salts that may be affected the uptake of phosphorus and help restore pH to the proper levels.

• In soil, phosphorus is best absorbed by the roots in the 6.2 – 7.0 pH range (in soil, it’s generally recommended to keep the pH between 6.0 – 7.0, but phosphorus specifically tends to be best absorbed above 6.2 and below 7.0)
• In hydro, phosphorus is best absorbed by the roots in the 5.5 – 6.2 pH range (in hydro, it’s generally recommended to keep the pH between 5.5 – 6.5, but phosphorus specifically tends to be best absorbed below 6.2)

2.) Take Good Care of the Roots
Wet, compact soil or overwatering can trigger a phosphorus deficiency to appear even when all other factors are perfect. So make sure you water your plants properly every time to help prevent a phosphorus deficiency.



3.) Provide the Right Temperature
Cooler temperatures lower than 60°F (15°C), as well as large temperature swings, can make it harder for the plant to absorb phosphorus. Cannabis plants are therefore more likely to show signs of a phosphorus deficiency when the temperature drops too low, or if they go through a cold spell.

Cannabis likes a comfortable room temperature (they like about the same temperatures as we do).


4.) Give the Right Nutrients
Most growers have actually already given plenty of phophorus to their cannabis plants since it is found abundantly in quality soil and cannabis-friendly nutrients. However, even if you are giving phosphorus, it’s important to give your cannabis the right ratio of nutrients.

An excess of Fe and Zn may cause the symptoms of a phosphorus deficiency by preventing the plant from being able to absorb phosphorus properly. If you believe there may be a buildup of nutrient salts in your growing medium (or if you are growing in hydro and have not recently flushed or changed your reservoir) you should make sure it’s not an excess of other nutrients that is actually causing the phosphorus deficiency to appear. Flush your plant thoroughly with properly pH’ed water containing a regular dose of cannabis nutrients including phosphorus, or completely change your reservoir if you believe that an excess of nutrient salts may be causing the phosphorus deficiency.

Sources of phosphorus:

• Bat guano (phosphorus is readily available, especially if made into a teat)
• Bone or blood meal (takes quite a bit of time to break down in soil unless made into a tea first)
• Worm castings or worm tea
• Soft Rock Phosphate
• Fish meal
• Crabshell
• Most cannabis-friendly “bloom” or “flowering” nutrients contain high levels of phosphorus to aid in flower production, and phosphorus from a liquid nutrient is one of the most readily available forms of phosphorus you can provide to your cannabis plants

If you’ve tried everything else, then you may try adding a higher percentage of phosphorus to your feeding schedule and see if that helps clear up the problem for your plant. Cannabis plants love phosphorus, and therefore it is unlikely that you will give your cannabis too much phosphorus.

Most nutrient systems that are formulated for a plant like cannabis will carry and abundance of phosphorus, especially in budding/flowering formulas, so it is unlikely that you will see signs of a phosphorus deficiency before other nutrient problems when using nutrient systems formulated for cannabis (as long as you keep your root pH in the correct range and prevent the plants from getting cold or being overwatered). If you’ve got very high powered lights, or if your plants are growing in direct sunlight, they may be going through a lot more phosphorus in the flowering stage than average and may need you to provide extra phosphorus to make sure buds get as big as they could be.

Just remember that if there’s no actual phosphorus deficiency currently appearing on your cannabis plant, adding more phosphorus is probbaly not going to help plants grow better or make bigger buds – in fact adding too much phosphorus may actually hurt your plants by preventing the uptake of other nutrients! While it’s difficult to overdose your plants on phosphorus, adding too much compared to other nutrients will often cause other strange & unexpected deficiencies to appear.

5.) Take Good Care of the Roots
Phosphorus deficiencies can show up with the plant is having root problems or if the plant is overwatered, even if the pH is right and the phosphorus is there. Proper watering practices help plants grow healthy and avoid a host of problems!



6.) Watch for Recovery
After going through all the above steps, watch to make sure that the phosphorus deficiency starts to clear up within a few days to a week or so. After a phosphorus deficiency is cleared up, the problem (brown spots, unhealthy lower leaves, red/purple stems, etc) will stop appearing on new leaves, usually within a week.

Please note that leaves which have been damaged by a phosphorus deficiency will probably never recover or turn green, so you want to pay attention to other leaves for signs of recovery.

 

[Rollincoal]

Thanks for the info. I am gonna do that tonight and see what the out come is in the morning.