Ask a Question forum→Dendrocalamus giganteus black spots on leaves

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Černilov, Czech republic.
Region: Europe
arepmic
Nov 24, 2019 4:08 AM CST
Hello, I tried different forums searching for answers and no one was able to identify a cause of black spots. I bough seeds of dendrocalamus giganteus from ebay 2 or 3 months ago. Germination rate was pretty good and now I have around 15 small plants. All growing in same conditions, same watering, same fertilizer. The biggest and strongest off all started to have black spots. It always starts at the tip of the leaf and eats it whole until it falls off.
Thumb of 2019-11-24/arepmic/756c89

Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
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DaisyI
Nov 24, 2019 11:04 AM CST
Welcome!

I can't tell you if you are growing bamboo or not as I have never heard of anyone actually finding bamboo seed for sale. They only bloom every 40 or 50 years.

The leaves look like they are suffering from salt burn, caused by too much fertilizer. Seedlings don't need fertilizer but, when they do (next spring) fertilize only 6 times a year with fertilizer mixed at 1/2 the recommended rate.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Černilov, Czech republic.
Region: Europe
arepmic
Nov 24, 2019 3:15 PM CST
DaisyI said: Welcome!

I can't tell you if you are growing bamboo or not as I have never heard of anyone actually finding bamboo seed for sale. They only bloom every 40 or 50 years.

The leaves look like they are suffering from salt burn, caused by too much fertilizer. Seedlings don't need fertilizer but, when they do (next spring) fertilize only 6 times a year with fertilizer mixed at 1/2 the recommended rate.


Actually they are selling a lot of bamboo seeds on ebay. But from what I heard most of them are Phyllostachys edulis and they sell them as different species. Some species flowers every 20 years or so and this species often flowers in different parts of china at any given time. But who knows.

Anything I can do to help my plant to recover from these burns ?
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Image
DaisyI
Nov 24, 2019 3:49 PM CST
Once leaves are damaged, there's nothing you can do to repair them except don't let it happen again.

I'm not sure what kind of plants you are growing but I'm pretty sure they aren't Dendrocalamus giganteus. I would like to see what they grow up to be so please keep us updated with new photos.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

President: Orchid Society of Northern Nevada
Webmaster: osnnv.org
Name: one-eye-luke US.Vet.
Texas (Zone 8a)
Quitter's never Win
Hummingbirder Birds Organic Gardener Dog Lover Cat Lover
oneeyeluke
Nov 25, 2019 4:38 AM CST
Fertilizer is probably your problem but I can't be sure with out knowing more about your growing system.

Both under- and over-watering can cause a bamboo with brown tips. Leaf tips turn brown when the lost water can't be replaced for some reason.This includes providing the plant with too much water, too little water or too much FERTILIZER.

Heat – Too much heat or direct sunlight may be the reason for a browning bamboo plant, as most bamboo varieties prefer shade or partial sunlight.
NOT A EXPERT! Just a grow worm! I never met a plant I didn’t love.✌

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