Advice on shade cloth...

watzone69

Al,

Check out my first post (#4).
Mike

Advertisement

Graydon

What?

Shade cloth blocks light. The light that is blocked does not end there, it is reflected somewhere else but it takes a prism to bend light. You can have reflected light but bent light... what?

__________________

bonsaial1

Maybe bending is a bad term, maybe merge factor would be better. How ever you slice it, if you put up 50% shade cloth closer than 12 feet from the ground, it will block more light. To give 50% sun blockage it needs to be that high. Check with a manufacturer they will give the specs on optimum blocking ability.

It is not the call out blockage at any distance. Conversely the farther away it is the more sun will come thru.

I totally missed that Mike. It has nothing to do with light from the side nor ventilation. For more on the phenomonon of shade cloth, look up "pin hole camera". Once you understand how light works it will make sense.

It's the same effect that allows you to see the whole sun during an eclipse thru a pinhole in a box.

__________________
I been kidding the last seven years.
no.... really!

watzone69

It makes sense to me.

I searched online and could only find shade heights for cattle protection. Guess what... they say 12' minimum also! I guess holsteins have the same shade requirements as japanese maples .

Cheers,
Mike

irene_b

"Big Macs" on the hoof require shade?
What is this world coming to?
Irene

__________________
Student of Life
Student of Nature

"From bonsai we receive peace of mind, health and a life’s pursuit. We can also learn generosity, patience and even philosophy about life. We can also have the good fortune to make friends of all nationalities and races with whom we share a mutual trust and respect. This is all thanks to bonsai." "Saburo Kato"




http://gongshi.freeforums.org/index.php
http://bonsaivaultforum.freeforums.org/portal.php

agraham

50% shade is 50% shade.The height recommendations are for better diffusion and airflow.

Place 1X2's spaced 1 3/4" apart, 6 inches above your trees.The light doesn't have time to be diffused.So some parts of the tree will get almost 100% sun and some will get almost none.Obviously,the movement of the sun in the sky(yes,I know that it is US revolving around the sun)keeps this from being 100% true....but the closer the shade material the more likely this to be true.The further away the shade material...the more likely that the tree will be evenly illuminated.

andy

__________________
http://pittmandavis.com/

soltan

I constructed a shade house last year to help reduce my leaf burn. It ended up worse than ever.
Some possible reasons I gather are the shade cloth of 70% was to strong to be used all season causing the leaves to be tender and burnt from the heat. Maybe if the trees went under the shade cloth only at the peak of summer it would improve?
Lack of ventilation in the area.
Lack of humidity / concrete floor
Rong colour shade cloth was green should be black
Bad watering from too many trees?
I even lost a couple of branches on hornbeam and maple.
I asked three different bonsai nurseries and got all these types of answers as well from members here. (So don't laugh at any of the possible reasons)

I have plans for a pagola this year and I find this thread very relavant.
Thanks
The temp here last year as it can hit the 45 deg celcious.(113 Fahrenheit)We are hopefully exiting the drought that gave us very dry conditions so hopefully this year will be better.

__________________
GROW DAMIT!
BRETT AUSTRALIA ZONE 8-9?

pup

.I use 50% as it is called in OZ Doe skin colour ( fawn light brown ). I put it up in late spring early summer, and take it down in early Autumn ( fall ) . It is I-5 metres ( 5ft ) high up from the trees. We have temps of 45%celsius (113 fahrenheit ) on a regular basis too. I have used this system for 15 years with no problems. It is only over the top not a shade house.

__________________
PUP
Advanced begginner


Heatzone USA9/10
Aus 3/4

Bonsaifreak

Funny you mention this. I already received a couple of comments from my not so friendly next door neighbor about the frame structure. It is a towering 7 1/2 feet tall and it does not block any views whatsoever. She has even mentioned calling the city about it...

Jorge

__________________
"Always acknowledge a fault. This will throw those in authority off their guard and give you an opportunity to commit more."
Mark Twain