Beans as living shade and a question about steel rebar stakes

[George]

Can you tell me whether it is a hazard in any way to use steel rebar for stakes in a grow bed?  I have a supply on hand and would like to use it, if feasible.  I could also drive them in the ground outside the grow beds, if necessary.

Has anyone tried living shade over grow beds?

If nothing else, beans might be a good option for shading the fish tank.

Direct sun and hot summer temps are tough on plants.

[Robert C. Wood]

If you are going to use the rebar keep it out of the system. the rebar will last longer and rust less. using the plants as a cover for your fish tank sounds good if it is a small tank but if it is bigger that 4x4 them you have to think about reaching the plant for pruning and harvesting.

[George]

It's a definite plan for 2015 to shade some of the beds and the fish tank with living vines, possibly beans, but maybe some other vine which produces food.  

Any suggestions for a heat tolerant vine, for use as shade?  The intent is to produce overhead shade, with the beds continuing to receive indirect and maybe some dappled direct light.

[Robert C. Wood]

you could use grape vines the love heat and water to a point. I have seen certain types of cucumber and squashes.

[George]

thanks - grapes are out - must be annual.  good suggestions

Robert C. Wood said:

you could use grape vines the love heat and water to a point. I have seen certain types of cucumber and squashes.