Does this look like calcium deficiency or maybe boron deficiency? Pics.

[rossee]

I noticed these spots on my leaves today, it must have developed in the last 24 hrs. I actually had this same problem on my last grow and it seemed to go away once I started using flowering nutes but I am nowhere near inducing flowering yet. The only thing I have been feeding it is Neptunes Harvest (2-3-1) every second or third watering. The strain is nirvana northern light. Lighting is 1 90 watt led + 2x42 watt cfl for some side lighting. Temperature is usually around 76 degrees. Soil is country cottage with around 20% perlite. I'd like to nip this problem in the butt before it gets worse so any advice is much appreciated.

rossee Reviewed by rossee on 03-22-2011. Does this look like calcium deficiency or maybe boron deficiency? Pics. I noticed these spots on my leaves today, it must have developed in the last 24 hrs. I actually had this same problem on my last grow and it seemed to go away once I started using flowering nutes but I am nowhere near inducing flowering yet. The only thing I have been feeding it is Neptunes Harvest (2-3-1) every second or third watering. The strain is nirvana northern light. Lighting is 1 90 watt led + 2x42 watt cfl for some side lighting. Temperature is usually around 76 degrees. Soil is Rating: 5

[TANKJR]

Hard to say...if your not over watering. PH? not enough K? Could be a lot of things...try filling out the troubleshooting form...the more info the better we can help you! It's a sticky at the top of this section, just cut and paste and fill it out as best you can, we'll see what we can come up with.

[rossee]

What is your experience level? Experienced Novice (lol does that make sense)
Your Equipment:
.1) Type and wattage of lights. 90 Watt LED, 2x42 watt CFL
.2) Distance from tops? 10 Inches above plants. CFL a couple inches away on sides
.3) Reflector type? Enclosed
.4) Is there a consistent fresh air supply? Open closet door couple times a day.
.5) Do you have an exhaust fan and a circulation fan? No exhaust fan. Circulating fan yes.
.6) What are the bulb wattages, kelvin ratings, and schedule? 90 Watt LED. 2x42 watt CFL 2700 K. Lights schedule 18/6.

Your medium:
.7) Specific brand and type of soil- Country Cottage Potting Soil (Soilless)
.8) Size of container. Standard Clay Pot about 9 1/2 inches deep.
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? No

Your nutrients and water:
10) Source of water? Gallon Jugs from super market.
11) Method of checking water ph. Rapitest Ph Soil Tester
12) Method of adjusting water ph. Have had no need to adjust.
13) Specific brand and N-P-K ratio for each bottle. Neptunes Harvest Fish and Seaweed Fertilizer 2â??3â??1
14) How often are you watering between feedings, and how much per watering? I water every 3 or 4 days and feed every 2nd or 3rd watering, Around 33.8 fl oz. (2 water bottles worth)
15) Any additives or tea's? Not at the moment. Will add molasses soon.
16) Are your ph levels stable, or do they fluctuate? Stable so far.
17) What is your ingoing water's ph? ...your runoff ph? Ingoing I am assume is fine since its bottled and the run off was around 7. Need better ph tester pickins were slim at the garden center since its winter.
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? No.

Your growroom:
19) Indoors or outdoors? Indoors
20) What size of closet, room or hut? 7ft long, 2 1/2ft wide, 8ft high.
21) What are the temps and humidity levels while lights are on? ...With lights off? 78 degrees, 37% humidity. Not sure when lights are off but it is a bedroom closet so temps are pretty stable.
22) Have you seen signs of insects in the growroom? None

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) Nirvana northern light feminized indica dominate
24) From seeds or clones? Seed
25) Is this an autoflower strain? No.

Also I have a white domina growing in the same conditions described with no problems. yet. knock on wood.

[TANKJR]

I think you may be over watering them a little, or over feeding slightly, but dunno how tell you to ck with a soiless mix as I have no experience with that, unless it was DWC, and that's not a problem with DWC...it just sounds like a lot for so young a plant...it doesn't look very serious yet, so make a small adjustment and see how they react.

[rossee]

I think I will start by cutting the amount of water I give them by half. I don't think its the neptunes harvest, I have used it many times with no problems, it isn't even that strong. If I were over watering can that actually cause those spots? Is it from the stress or something.

Thanks for your help.

[WashougalWonder]

You are over watering and over fertilizing. I also would move to plastic pot on the repot down the road. Notice how the leaves are curling up on the edges....these are signs in my garden of 1) over watering and 2) lockout (caused by too much nute love) I was not clear on what the potting mix is .... a soil that is soil less. That would put you in hydro in my book, but what the heck. I only do soil, so I could be wrong.

To summarize: Overwatering and over fertilizing, causing mucho stress on this young indica.

Do not neglect checking the pH of the water you give.

[rossee]

Ya isn't that strange, potting soil that is soilless. Looks like any other potting soil I have used and the guy at the garden center said it was organic and that he recommended it. I will take your advice and repot down the road into a plastic container, but can I ask why? Just curious. Also I just realized my perlite has an NPK ratio of 0.04-0.01-0.06. Hopefully that is not contributing with my plants issues?

Thanks again.

[WashougalWonder]

Easier to get out of plastic than ceramic.

[MEDEDCANNABIS]

What is your experience level? Experienced Novice (lol does that make sense)
Your Equipment:
.1) Type and wattage of lights. 90 Watt LED, 2x42 watt CFL
.2) Distance from tops? 10 Inches above plants. CFL a couple inches away on sides
.3) Reflector type? Enclosed
.4) Is there a consistent fresh air supply? Open closet door couple times a day.
.5) Do you have an exhaust fan and a circulation fan? No exhaust fan. Circulating fan yes.
.6) What are the bulb wattages, kelvin ratings, and schedule? 90 Watt LED. 2x42 watt CFL 2700 K. Lights schedule 18/6.

Your medium:
.7) Specific brand and type of soil- Country Cottage Potting Soil (Soilless)
.8) Size of container. Standard Clay Pot about 9 1/2 inches deep.
.9) Did you use peat pucks (or similar) to root clones or germinate seedlings? No

Your nutrients and water:
10) Source of water? Gallon Jugs from super market.
11) Method of checking water ph. Rapitest Ph Soil Tester
12) Method of adjusting water ph. Have had no need to adjust.
13) Specific brand and N-P-K ratio for each bottle. Neptunes Harvest Fish and Seaweed Fertilizer 2â??3â??1
14) How often are you watering between feedings, and how much per watering? I water every 3 or 4 days and feed every 2nd or 3rd watering, Around 33.8 fl oz. (2 water bottles worth)
15) Any additives or tea's? Not at the moment. Will add molasses soon.
16) Are your ph levels stable, or do they fluctuate? Stable so far.
17) What is your ingoing water's ph? ...your runoff ph? Ingoing I am assume is fine since its bottled and the run off was around 7. Need better ph tester pickins were slim at the garden center since its winter.
18) Do you foliar feed? If so, with what, how often, and at what time do you spray? No.

Your growroom:
19) Indoors or outdoors? Indoors
20) What size of closet, room or hut? 7ft long, 2 1/2ft wide, 8ft high.
21) What are the temps and humidity levels while lights are on? ...With lights off? 78 degrees, 37% humidity. Not sure when lights are off but it is a bedroom closet so temps are pretty stable.
22) Have you seen signs of insects in the growroom? None

Your strain:
23) What strain are you growing? (Indica dominate or Sativa dom?) Nirvana northern light feminized indica dominate
24) From seeds or clones? Seed
25) Is this an autoflower strain? No.

Also I have a white domina growing in the same conditions described with no problems. yet. knock on wood.

if it is in fact a soiless mix your ph should be 5.5-5.8. start with that issue first. ph can block certain nutes ,if not corrected it can look like def which can lead to overnute by the user. this can become serious and confusing if not corrected early. also strains tend to have preferences and need to be dialed in. nl is an easy strain to grow so it should be fairly forgiving.

[rossee]

Ya it is definitely a soilless mix. I just tested the ph with a soil tester and it was closer to 6.5-7.0. I will try to correct this problem asap.