Possible nute burn week 5 flower?

Cannaleaf9 · Oct 2, 2021

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

GNick55 · Oct 2, 2021

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

Cannaleaf9 · Oct 2, 2021

GNick55 said:
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 · Oct 2, 2021

Cannaleaf9 said:
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

Cannaleaf9 · Oct 2, 2021

NairnM16 said:
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

Great thanks!

Evr1sFavKush · Oct 2, 2021

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.

Cannaleaf9 · Oct 3, 2021

Evr1sFavKush said:
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 · Oct 3, 2021

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.

GNick55 · Oct 3, 2021

a little guide..

Johnypotseed497864 · Jan 22, 2022

Cannaleaf9 said:
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 · Jan 22, 2022

Cannaleaf9 said:
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.

Johnypotseed497864 · Jan 22, 2022

Over all gonna be nice ass nug porn in the end

Johnypotseed497864 · Jan 22, 2022

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

Daggaswag · Feb 13, 2022

Cannaleaf9 said:
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?

Cannaleaf9 said:
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!

Possible nute burn week 5 flower?

Possible nute burn week 5 flower?

Cannaleaf9

GNick55

Cannaleaf9

NairnM16

Cannaleaf9

Evr1sFavKush

Cannaleaf9

Imzzaudae

GNick55

Johnypotseed497864

growsince79

Johnypotseed497864

Johnypotseed497864

Daggaswag

Privacy & Transparency

Privacy & Transparency