Full sun vs Shade cloth

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ElieEstephane
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Re: Full sun vs Shade cloth

Post by ElieEstephane » Tue Jan 02, 2018 10:11 am

The smaller size is the opposite of etiolation. The plant stays squat to escape the sun but the internal clock is still winding towards maturity even if the plant is not of size.
There are more cacti in heaven and earth, Horatio, than are dreamt of in your philosophy.
One of the few cactus lovers in Lebanon (zone 11a) :mrgreen:

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ElieEstephane
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Re: Full sun vs Shade cloth

Post by ElieEstephane » Tue Jan 02, 2018 10:13 am

This cardon was put in the full sun (sunrise to sunset) since it was a 4cm seedling. The result was a much denser spination compared to other nursery imports. Doesn't show clearly in the photo but the body is almost hidden.
I never used a shade cloth although i have a very large roll. This year i'm gonna deploy it. Most of my cacti are gonna be used as landscaple plants in the ground so there's no point of having them small. On the other hand, the cacti that i'm growing for their spines will stay in the full sun to grow their spines better
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There are more cacti in heaven and earth, Horatio, than are dreamt of in your philosophy.
One of the few cactus lovers in Lebanon (zone 11a) :mrgreen:

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majcka
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Re: Full sun vs Shade cloth

Post by majcka » Tue Jan 02, 2018 1:24 pm

Almost whatever I grow outside went to eternal hunting grounds.....you probably have warm and dry winters and can aford to have them outside all year round. So I decided not to grow them outside anymore. Put some of them outside during summer, but most of them are in greenhouse and there are different conditions. The shelves right next to polycarbonate are shaded...others arent.

I believe it is OK to have a plant on one spot the whole time...then it can adjust to conditions. If you move one plant inside and outside then it has less time to adjust...it can get burns and such.

So there is no easy answer to one vs. another. It depends on case-by-case basis.

Let your plants be fine on full sun or under a shade cloth.
Maja

Strange is fun, cacti are funnier!
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brixtertabun
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Re: Full sun vs Shade cloth

Post by brixtertabun » Thu Jan 04, 2018 8:03 am

My cacti get sunburn when under full sun :crybaby: I guess I'll settle with smaller, less spiny cacti without sunburns.

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stefan m.
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Re: Full sun vs Shade cloth

Post by stefan m. » Thu Jan 04, 2018 8:14 am

Not all are susceptible - Some are more resistant than others
- Stenocereus (griseus turns purple, then stops, others have no change)
-Pilosocereus
- Ferocactus with proper acclimation
-Opuntias are almost immune
-Pachycereus is not affected
Could be others, but im sure for those at least

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mdpillet
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Re: Full sun vs Shade cloth

Post by mdpillet » Thu Jan 04, 2018 9:04 am

stefan m. wrote:Not all are susceptible - Some are more resistant than others
- Stenocereus (griseus turns purple, then stops, others have no change)
-Pilosocereus
- Ferocactus with proper acclimation
-Opuntias are almost immune
-Pachycereus is not affected
Could be others, but im sure for those at least
No such generalizations are valuable. You can fry anything, including the genera you list, under the right conditions.

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stefan m.
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Re: Full sun vs Shade cloth

Post by stefan m. » Thu Jan 04, 2018 9:10 am

Thats true- but im speaking out of experience where , though placed at the same time, grown in the same conditions in winter, the stenocereus just went purple, while the cereus and neoraimonidia were defaced in an instant- i think its got something do with initial glausense- the latter were not heavy on it. So ,remember that this is from the time i was a rookie grower and made foolish mistakes easily.
I sincerely believe some plants, whether or not it comes down to species, or growing conditions, are more resistant than others- who knows what the wholesalers were doing before i bought the plants. And this is from someone that managed to 'fry ' houseleeks.

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7george
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Re: Full sun vs Shade cloth

Post by 7george » Sun Jan 07, 2018 1:55 pm

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Thelocactus macdowellii under some shade grid (above) and under full sun (next photo) in Phoenix.
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The difference is small, they all did flowers, just the spines are denser under full sun. I think small species that in nature grow under grass or other vegetation is better to keep under some shading if your sun is strong. Glass or plastic also adsorb and reflect some of the sun light. Also many species from low lands if kept at mountain environment would need some shading. And opposite: mountain cacti may feel good outdoors at full sun especially if your air is not so clear as in many big cities etc.

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ElieEstephane
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Re: Full sun vs Shade cloth

Post by ElieEstephane » Sun Jan 07, 2018 2:47 pm

It's all a matter of opinion in the end. Some people love the the rough habitat like look. I personnally like plump unblemished plants. There's just something not attractive in a yellowed cactus.
I had some very densely spined M. Elongata and M. Pilcayensis that spent all day in the full sun at the coast and when i moved them to my mountain house for the summer (1600m), they literally fried from just a couple of hours of morning sun so i had to shade them under a grape vine.
Full sun is 6 hours and more but it all depends on how much more sun and on the location and elevation.
There are more cacti in heaven and earth, Horatio, than are dreamt of in your philosophy.
One of the few cactus lovers in Lebanon (zone 11a) :mrgreen:

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