Please Help with Agave problem

bibbus 7b(7b)May 17, 2014

My beautiful agave has ugly yellowish spots on it. I transplanted it last year and it has more than doubled in size but it has these spots on it. It is in front of a large window that get full sun in the morning. I was about to take it outside to acclimate it to my back porch which only gets partial morning sun.

A few days ago, I fed it with half strength organic fertilizer thinking it may not be getting nutrients from the potting medium which is 2/3 cactus medium and 1/3 potting soil. I had the parent agave to this plant for about 20 years and have never seen this before. I will post another picture that has different looking spots on a smaller plant that came from the same parent plant. Could it be from cold - too close to a window? Nutrition deficiency? Disease? What is it and how should I treat it?

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littlekirstenjr(8)

To me, those blemishes look a bit like sun burns, but wait for others to chime in and see what they think.

    Bookmark   May 17, 2014 at 2:12PM
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bibbus 7b(7b)

This plant has been in the same window for 6-8 months. I was wondering if it could be from cold temperatures? In January I was away from home for 3 weeks and my house was at 50 degrees for much of that time. It got down to 0 one night and was cold the whole time. I was wondering if it could be damage from that? Since its in front of a window, it could have gotten colder than 50.

    Bookmark   May 18, 2014 at 5:13PM
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hoovb zone 9 sunset 23

A. attenuata can go down to about 35F without damage. That particular species can get leaf marring from water sitting on a leaf too long, from getting bumped, from getting handled by toddlers or cats, from getting dusty in some spots but not others and then exposed to sunlight, from hot sun, etc. Likely nothing to worry about unless you want absolutely pristine foliage.

    Bookmark   May 18, 2014 at 5:23PM
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KittieKAT

I'm thinking sun burn as Well

    Bookmark   May 18, 2014 at 6:15PM
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KittieKAT

I'm thinking sun burn as Well

    Bookmark   May 18, 2014 at 6:16PM
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cactusmcharris

I'm thinking cat handling - they're furry destructors.

    Bookmark   May 18, 2014 at 11:01PM
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bibbus 7b(7b)

Thank you, all. I will try moving it back from the window. I have no animals or children so that eliminates some possible causes! I'll get my little dust wand out and check to see if there is any dust there as well.

    Bookmark   May 19, 2014 at 7:16AM
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KittieKAT

good luck hunnie

    Bookmark   May 19, 2014 at 6:02PM
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bibbus 7b(7b)

Thank you for your help. I moved the agave out onto my back screened in porch and out of direct sunlight. The spots actually turned black like a bruise, but now appear to be healing and actually turning green again. But this is so strange since agave's are supposed to be full sun. I have some babies that I had planned to put in an outside planter and it gets full afternoon sun (with no morning sun). If I gradually acclimate it and the other succulents I had planned to put in that planter, do you think they will be OK? Do you think the glass window had anything to do with the sunburn?

    Bookmark   June 2, 2014 at 10:26AM
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GeeS 9b

If I placed A. attenuata out in full sun, I would return to a pile of ashes in a few days.

    Bookmark   June 2, 2014 at 11:17AM
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bibbus 7b(7b)

Interesting! After I posted that last message I did look up agave conditions online and found that they are full to part sun and do need shielding from really hot, direct sun. I have had this plant for 20 years, well I should say the rosette came from the original plant I got more than 20 years ago, and I have frequently put it in direct sun. Maybe it was never that close to the window before though. I assumed it was like a cactus! So I will change my plans for the outdoor planter. Thanks for your comments. I would be interested in where you have yours planted if its outdoors.

    Bookmark   June 2, 2014 at 5:38PM
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GeeS 9b

Many Agaves reside in the low desert - high desert transitional zone. They are almost always found at some elevation, where temps are cooler and moisture more abundant. Many cacti thrive under conditions that most Agaves could not tolerate. Definitely a different creature.

    Bookmark   June 2, 2014 at 7:24PM
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