Is this color a symptom of something?

Trouble shoot problems you are having with your cactus.
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mmcavall
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Is this color a symptom of something?

Post by mmcavall »

Some of my cacti, those ones that are suposed to be green, are not looking good.

The images says better than my English so please take a look below.

Image

Image

Image

Image

Note that different species display the same symptoms. They are pale-yellowish but the very top of the plant looks better. Also, there are small dark green dots visible along the body of the plant, more evident in the parts that are more yellow.

Thanks for any clues.
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adetheproducer
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Re: Is this color a symptom of something?

Post by adetheproducer »

They both look fine, if anything maybe a little more light will bring out the green colour.
And as the walls come down and as I look in your eyes
My fear begins to fade recalling all of the times
I have died and will die.
It's all right.
I dont mind
I dont mind.
I DONT MIND
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kristian_Fossmo
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Re: Is this color a symptom of something?

Post by kristian_Fossmo »

It can also be chlorosis, deficiency in Fe (Iron) is a main cause to chlorosis.
"When the last individual of a race of living things breathes no more, another heaven and another earth must pass before such a one can be again."
William Beebe, 1906
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greenknight
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Re: Is this color a symptom of something?

Post by greenknight »

Other nutrient deficiencies can cause chlorosis as well. The fact that the new growth has better color does point to some kind of nutrient deficiency, plants will move nutrients to the newer growth when there's a shortage. Test the pH of your mix, soil that's too acidic can reduce the uptake of nutrients.
Spence :mrgreen:
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CactusMad
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Re: Is this color a symptom of something?

Post by CactusMad »

Hi,what does the mix consist of that they are in?
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mmcavall
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Re: Is this color a symptom of something?

Post by mmcavall »

hi all, thanks for replying.

I should have added some info before. These plants are under full sun (so the problem is not weak light), in clay pots with a mixture of grit, top soil and charcoal (one of my first mixes, which I'm slowly changing).

I agree that the greener tops poit to some kind of nutrient. It could be nitrogen (?), which is easly washed from the pots with constant waterings. Or Mg...or others...I'll choose one of the plants to receive some fertilizer, and compare the results.

It is interesting, however, that this color is not permanent/consistent, which is close to what Adetheproducer said. I have already noted that some days it is more visible, some days, less (I took the pictures and posted here because that day this "symptom" was more evident, and I decided to take the pictures exactly because it is not always visible).

For example, two days after posting the pictures above, I took new pictures (below), and the plants look quite better.

Some days when is colder I think it is due to the cold. But these days have been very hot. It is something to be observed yet.

the pictures of the same plants 2 days after the first pictures:

Image

Image
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Orion Drakkar
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Re: Is this color a symptom of something?

Post by Orion Drakkar »

Hi Marcelo
My cacti grow in outdoor, and when the sun is very strong some plants turn yellow, but the next day they return to normal.
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greenknight
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Re: Is this color a symptom of something?

Post by greenknight »

Could be a reaction to the strong light or the heat.
Spence :mrgreen:
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adetheproducer
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Re: Is this color a symptom of something?

Post by adetheproducer »

Another suggestion could be to do with the pruinose waxes on the skin surface. I find with my plants this changes texture and transparency with temperature, humidity and light throughout the year.
And as the walls come down and as I look in your eyes
My fear begins to fade recalling all of the times
I have died and will die.
It's all right.
I dont mind
I dont mind.
I DONT MIND
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mmcavall
Posts: 1436
Joined: Tue May 17, 2016 11:54 pm
Location: São Carlos - SP, Southeast Brazil, Cerrado Region

Re: Is this color a symptom of something?

Post by mmcavall »

Thanks again for replying. I'll try to observe the correlation between this "symptom" and environmental conditions. Today is very hot and plants look nice.
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