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Main Banana Discussion This is where we discuss our banana collections; tips on growing bananas, tips on harvesting bananas, sharing our banana photos and stories.


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Old 03-11-2018, 02:41 PM   #1 (permalink)
 
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Default Any idea whats causing this?

Anyone know what might be causing my new leafs to have these brown/burn marks? Live in southern california and hasn't even been much sun lately.

https://i.imgur.com/UOgTQxK.jpg

Thanks!
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Old 03-11-2018, 04:09 PM   #2 (permalink)
 
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Default Re: Any idea whats causing this?

Please tell us more about your fertilization schedule and watering schedule... How much of what and how often?
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Varieties I supposedly bought: Manzano, Cavendish, Blue Java, Sweetheart, and Gros Michel.
What it seems I actually have: Brazilian, Cavendish, Namwah, Dwarf Red, Gros Michel, Pisang Ceylon, Veinte Cohol and SH 3640, and American Goldfinger. FHIA 1, Paggi and FHIA 17... Always room for one more.
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Old 03-11-2018, 05:23 PM   #3 (permalink)
 
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Default Re: Any idea whats causing this?

It's on our regular sprinkler system which waters on Tues (10 min) and Friday (10 min) each week. I am planning to move it to a drip system next month.

As for fertilizer, all I have been using is the bag the company who planted it gave us. Its called Moon Dust https://www.moonvalleynurseries.com/...zers/Moon-Dust

Not sure if maybe this is the issue and it's causing these odd burn streaks.

Thanks for your help.
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Old 03-11-2018, 06:04 PM   #4 (permalink)
 
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Default Re: Any idea whats causing this?

I live in Hilton Head and have the same thing on my new leaves.I am new to this so canít help you.
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Old 03-11-2018, 06:48 PM   #5 (permalink)
 
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Default Re: Any idea whats causing this?

Quote:
Originally Posted by bananaSD View Post
Anyone know what might be causing my new leafs to have these brown/burn marks? Live in southern california and hasn't even been much sun lately.

Thanks!
I would guess too much water, it's not out of the dormant season yet.
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Old 03-11-2018, 08:45 PM   #6 (permalink)
 
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Default Re: Any idea whats causing this?

Quote:
Originally Posted by bananaSD View Post
It's on our regular sprinkler system which waters on Tues (10 min) and Friday (10 min) each week. I am planning to move it to a drip system next month.

As for fertilizer, all I have been using is the bag the company who planted it gave us. Its called Moon Dust https://www.moonvalleynurseries.com/...zers/Moon-Dust

Not sure if maybe this is the issue and it's causing these odd burn streaks.

Thanks for your help.
Change fertilizers to a balanced triple type formulated for gardens (not trees). My cost for 10-10-10 is $10 for 50lbs. $30 for 20lb bag of Moon Dust is outrageous. ... The Moon Dust manufacture website does not give complete element analyst nor is a label readable. Obviously a very hyped product and very little data for the user and no micro elements are provide for (???). ... However, 16-8-4 general purpose fertilizer is wrong for bananas unless you are also supplementing the potassium with something else. ... The manufacture indicates that Moon Dust contains additional gypsum & sulfur. So I suspect the sulfur may be causing a highly acidic soil condition. Check the soil Ph with meter in several places around the base of the banana plant. Ph should be about 6 to 6.5 for bananas.

Read the forum wiki for more info about fertilizer for Bananas. Info:Fertilizer - Bananas Wiki
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Old 03-11-2018, 09:25 PM   #7 (permalink)
 
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Default Re: Any idea whats causing this?

I know it's a nutrient issue but not sure which one. Too acidic could be the issue...
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Varieties I supposedly bought: Manzano, Cavendish, Blue Java, Sweetheart, and Gros Michel.
What it seems I actually have: Brazilian, Cavendish, Namwah, Dwarf Red, Gros Michel, Pisang Ceylon, Veinte Cohol and SH 3640, and American Goldfinger. FHIA 1, Paggi and FHIA 17... Always room for one more.
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Old 03-12-2018, 03:52 AM   #8 (permalink)
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Default Re: Any idea whats causing this?

The curving of the outer edge of the leaf is a sign of overwatering. I would cut back on water and fert! Just let it catch up and see what happens.
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Old 03-12-2018, 10:50 AM   #9 (permalink)
 
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Default Re: Any idea whats causing this?

I do agree with Tytaylor about the water. But I'm more worried about the gypsum & sulfur added to the fertilizer. These are two items that should not just be arbitrarily added to the soil without a specific need to lower the Ph. ... Gypsum depending on it source might be highly acidic itself. Cheap gypsum as a byproduct of admissions smoke/flue scrubbing contains sulfuric acid. These were not added as minor elements as the manufacturer indicated the gypsum was to break up heavy dense soils.

Cut back on the water; change fertilizers but withhold any for the present; Check the soil Ph and tell us what it is.
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Old 03-14-2018, 07:42 PM   #10 (permalink)
 
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Default Re: Any idea whats causing this?

I was able to check the PH level of the soil today and it was a 7. I guess I should just cut back on the watering and see if the next few leaves look normal?

Also, does anyone have a recommended fertilizer I should buy that does well for your bananas?

Thanks for the help.
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Old 03-14-2018, 08:23 PM   #11 (permalink)
 
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Default Re: Any idea whats causing this?

The Ph is a little high and will reduce the take up of micro minerals by the plant. Bananas need a Ph range of 6 to 6.5 ... So add 1lb of sulfur per 100 sq ft area around the plant. ref: How to Lower Soil pH - The Homeowners Column - University of Illinois Extension serving Champaign, Ford, Iroquois and Vermilion Counties

Any fertilizer with micro elements formulated for vegetable gardens will do. I use 10-10-10, but any of the balanced triples will do. Just calculate the application rate based on the nitrogen content and supplement potassium with potassium sulfate or murate of potash (MOP)

Did you review the fertilizer info on the forum wiki? It will you details of what other users use.
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Old 03-21-2018, 12:10 PM   #12 (permalink)
 
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Default Re: Any idea whats causing this?

Quote:
Originally Posted by bananaSD View Post
Anyone know what might be causing my new leafs to have these brown/burn marks? Live in southern california and hasn't even been much sun lately.

https://i.imgur.com/UOgTQxK.jpg

Thanks!
Which Musa cultivar is this? I couldn't find the name in the thread.
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Old 03-23-2018, 12:33 AM   #13 (permalink)
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Default Re: Any idea whats causing this?

Quote:
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Which Musa cultivar is this? I couldn't find the name in the thread.
Looked like an E. Maurelli To me.

How are the newer leaves looking?
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Old 03-24-2018, 11:35 AM   #14 (permalink)
 
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Default Re: Any idea whats causing this?

UPDATE: The new leaf is looking beautiful that just came in (picture link below).

I took the advice from everyone and cut back all watering and stopped that moon dust fertilizer. Hopefully that is what is helping. As the weather starts to heat up I will increase the watering and also look for a good 10-10-10 fertilizer as was recommended. Is there anything else I should feed it to help growth?

https://i.imgur.com/0EBQSdR.jpg

Thanks for your comments and help.
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Old 03-24-2018, 11:13 PM   #15 (permalink)
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Default Re: Any idea whats causing this?

Looks perfect! All signs of overwatering are gone on that new leaf! Great job!
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Old 03-25-2018, 07:07 PM   #16 (permalink)
 
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Default Re: Any idea whats causing this?

Do you think I should trim off these lower hanging leafs that look almost dead? Picture Below

https://ibb.co/mYVgKn

I also noticed from the non-watering and non-moon dust fertilizer, my PH level dropped to 4.5 It was almost 7 about 2 weeks ago. Not sure if i need to add anything for this, or the 10-10-10 will help?

Thanks for the input!
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Old 03-25-2018, 07:33 PM   #17 (permalink)
 
Location: Cairo, Ga
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Default Re: Any idea whats causing this?

Quote:
Originally Posted by bananaSD View Post
Do you think I should trim off these lower hanging leafs that look almost dead? Picture Below

https://ibb.co/mYVgKn

I also noticed from the non-watering and non-moon dust fertilizer, my PH level dropped to 4.5 It was almost 7 about 2 weeks ago. Not sure if i need to add anything for this, or the 10-10-10 will help?

Thanks for the input!
That's quite a drop in Ph. Recheck it and check the soil further out from the plant and a couple of places in area. Get to know what the normal soil Ph is. Is that a raised planting bed with mulch in the photo? ... Also, check the Ph of your water. ... Did you add any sulfur as I indicated above?

Lime will raise the Ph but we need to know why the Ph dropped so sudden.
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Old 04-06-2018, 11:48 AM   #18 (permalink)
 
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Default Re: Any idea whats causing this?

Another quick update. Got a new leaf coming in and it's looking good, no signs of the burn marks. I am guessing as the weather starts warming up the new leaves will start coming more frequent.

https://ibb.co/inyiHH

One thing I did notice today is I checked my Ph level and it has dropped all the way to the 3-4 range. Is this something I should be concerned with and maybe supplementing?

Thanks for the help
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