Hi Denise. If you don't want to drill through the siding you could attached landscaping spikes to the bottom of the trellis and put it into the ground as close to the house as you can.
Hi Denise: Well, you really shouldn't put a trellis next to your house. The vines of the climbing plants will get in and under your vinyl siding and lift it off:( You should put it about a foot away from the house so that you can monitor the vines from doing just that. You can get something for a 4x4 post called a Simpson Strong E-Z Spike that you just pound into the ground (use a scrap piece of 4x4). I have used them for years and they're wonderful! Or, you can dig a hole and put your posts in that and fill it with a concrete mix that you just pour water over. That's pretty easy too:) Just make sure everything is plumb or straight. But, the important thing is to not let the plant touch your house. Good luck
really need to check into your siding warranty/guarantee before doing something like this it will make it useless. Use long metal fence posts pounded in ground not too close to house(so damages to not incur to siding or foundation from vines,also keeps bugs/rodents from climbing up trellis onto house) then attach the trellis to the metal posts using metal brackets,these will provide adequate support for trellis,plants on trellis and protection from the wind or storms knocking it over up against house causing damages;posts at each side/section of trellis if you are putting them beside each other;depending how tall the trellis is get fence t-post according the taller the trellis the taller the post needed (the posts come 3ft-10ft tall) get online or hardware store or barn supply stores use pipe straps screwed into trellis(wood? vinyl? metal?) to hold it onto metal t-posts
You can use cup hooks so you can lift off and on if necessary.