Possible nute burn week 5 flower?

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Cannaleaf9

Cannaleaf9

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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

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raise your light at least 5 inches.,
your feeding it too much also..
 
Cannaleaf9

Cannaleaf9

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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

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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

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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.
 
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Cannaleaf9

Cannaleaf9

36
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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

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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.
 
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