Possible nute burn week 5 flower?

  • Thread starter Cannaleaf9
  • Start date
  • Tagged users None
Cannaleaf9

Cannaleaf9

36
18
I'm in week 5 of flower of my first grow. Can somebody help me identify this issue?

Fox farm ocean forest soil.

Fox farm trio feeding schedule.

I give half of big bloom, grow big and tiger bloom. 3ml calmag, 3 ml silica, and 1tsp recharge once a week.

I did add 1/4 tsp of beastie blooms for week 3 and 4 of flower.

Run off ph is at 6.6.

H80 L69 RH50-55%.

Light mars sp3000- 300W about 16.5 inches away from top.

Have only used reverse osmosis water.

These pics are primarily of the top fan leaves.

The yellowing at the tips started about a week ago
IMG 7844

IMG 7845
IMG 7851
 
GNick55

GNick55

Staff
Supporter
5,122
313
raise your light at least 5 inches.,
your feeding it too much also..
 
Cannaleaf9

Cannaleaf9

36
18
raise your light at least 5 inches.,
your feeding it too much also..
Will do thank you. I feed/water/feed/water every 4 days with a feed coming up tomorrow. My run off ppm was 1100 after my last plain water. Should I flush or just plain water instead of feed tomorrow?
 
NairnM16

NairnM16

298
43
Will do thank you. I feed/water/feed/water every 4 days with a feed coming up tomorrow. My run off ppm was 1100 after my last plain water. Should I flush or just plain water instead of feed tomorrow?
You’ve just found your plants max ppm
Dial it back to around 900 nd bump it up about 20ppm q day until your flush week 8/9 should be fine plants look good
 
Evr1sFavKush

Evr1sFavKush

34
18
It’s not nutes burn as in over fertilization, it’s burn due to deficiency. Calcium deficient. You are using reverse osmosis water and are in week 5. Most cannabis will use more calcium in the first 3 weeks. Your plant has run out of calcium at the worst possible time, flower bulk. Week 4 and 5 are where you see calcium def most often as this is the time of greatest flower growth and you’ve used all you soils calcium in the early weeks of flower. Next run, add some cal or even calmag starting end of week 3 you will not have that chlorosis and spotting. If you have decent tap with about 0.3ec you can try that first for the entire run, before adding in cal/mag.

I also notice you are using led, led will need more cal and or mag regardless.

Edit: your plants look good still, you should of seen my first grow.
 
Last edited:
Cannaleaf9

Cannaleaf9

36
18
It’s not nutes burn as in over fertilization, it’s burn due to deficiency. Calcium deficient. You are using reverse osmosis water and are in week 5. Most cannabis will use more calcium in the first 3 weeks. Your plant has run out of calcium at the worst possible time, flower bulk. Week 4 and 5 are where you see calcium def most often as this is the time of greatest flower growth and you’ve used all you soils calcium in the early weeks of flower. Next run, add some cal or even calmag starting end of week 3 you will not have that chlorosis and spotting. If you have decent tap with about 0.3ec you can try that first for the entire run, before adding in cal/mag.

I also notice you are using led, led will need more cal and or mag regardless.

Edit: your plants look good still, you should of seen my first grow.
I’ve used 3ml cal mag/gal every week. Next time I’ll up to 5ml for flower. Thanks for taking the time to comment. That input helps!
 
Imzzaudae

Imzzaudae

196
43
These plants are well into flower. Cut the Nitrogen and Potassium way back. 1/4 what you where feeding in veg or less. Bump up the Phosphorus.
Look at the red stems! I'm a watering can feeder so I can't offer ppm info. But if you cut the Nitrogen and Potassium back to 1/4 what you where feeding in veg and up the Phosphorus to 3 phosphorus -1 N you should be in the ball park.
Maybe a little cal-mag just in case. Yes your going to stress it. The plant is finished growing and it will put everything into it's flowers. Leaves will yellow and fall off. The plant will look really terrible but the buds will make up for yellow leaves as the plant strips them of nutrients.
Keep it clean and don't hurry it along. Let it ripen until the whiter hairs are 75% brown. You will see sugar lots and lots of sugar. When it's 75% brown give it only water for 14 days. Let it use up all the nutrients left in it.
Then Harvest.
 
Last edited:
J

Johnypotseed497864

14
3
I'm in week 5 of flower of my first grow. Can somebody help me identify this issue?

Fox farm ocean forest soil.

Fox farm trio feeding schedule.

I give half of big bloom, grow big and tiger bloom. 3ml calmag, 3 ml silica, and 1tsp recharge once a week.

I did add 1/4 tsp of beastie blooms for week 3 and 4 of flower.

Run off ph is at 6.6.

H80 L69 RH50-55%.

Light mars sp3000- 300W about 16.5 inches away from top.

Have only used reverse osmosis water.

These pics are primarily of the top fan leaves.

The yellowing at the tips started about a week ago
View attachment 1174933
View attachment 1174934 View attachment 1174935
Bring your ph up use tap water set for 24 hours with a air stone in it keep total ppm at 800 you'll be fine back off the calmag to quit using it its will balance out through the tap water calcium already do a 4 gallon flush through every pit u got get the ph to 6.8 lay off the bloom finish out no nutes after your flush u got a nute lock out or p lock out I'm sure of it
 
growsince79

growsince79

7,727
313
Will do thank you. I feed/water/feed/water every 4 days with a feed coming up tomorrow. My run off ppm was 1100 after my last plain water. Should I flush or just plain water instead of feed tomorrow?
1000ppm in ffof is nothing. New bags are about 2400-3000ppm runoff.
 
J

Johnypotseed497864

14
3
And u wondering why have burn issues funish with ph water straight from tap buds will swell crazy fied trust me
 
Daggaswag

Daggaswag

5
3
Will do thank you. I feed/water/feed/water every 4 days with a feed coming up tomorrow. My run off ppm was 1100 after my last plain water. Should I flush or just plain water instead of feed tomorrow?
I'm in week 5 of flower of my first grow. Can somebody help me identify this issue?

Fox farm ocean forest soil.

Fox farm trio feeding schedule.

I give half of big bloom, grow big and tiger bloom. 3ml calmag, 3 ml silica, and 1tsp recharge once a week.

I did add 1/4 tsp of beastie blooms for week 3 and 4 of flower.

Run off ph is at 6.6.

H80 L69 RH50-55%.

Light mars sp3000- 300W about 16.5 inches away from top.

Have only used reverse osmosis water.

These pics are primarily of the top fan leaves.

The yellowing at the tips started about a week ago
View attachment 1174933
View attachment 1174934 View attachment 1174935
Looks like calcium deficiency. Brown spots on the top of plants? Maybe lockout. Maybe mag deficiency too. Tricky part is that it can be caused by excess potassium. If you haven’t been pushing the upper ratios of fertigation, I’d say your just plain old calcium deficient. Lower your synthetic base nutes and add more cal/mag. Also, there are better soils than Ffof imo. It gets aqua phobic. I’ve only used it as part of a super soil In the past and not at all these days. Feel free to message me for extra info. I got that growlight knowledge too. Good luck!
 

Similar threads

B
Replies
3
Views
302
Bossman71
B
Vb2flat2surf
Replies
5
Views
877
Vb2flat2surf
Vb2flat2surf
Vb2flat2surf
Replies
32
Views
773
Vb2flat2surf
Vb2flat2surf
Redbush117
Replies
8
Views
648
BDH420
BDH420
L
Replies
6
Views
270
LostInTheTranslation
L
Top Bottom