Build an A-Frame Tomato Trellis

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Download the trellis project plan (pdf).

Michael Gellatly

Slow and steady drilling will keep the bit from wandering.

Boyd Hagen

Placing some of the screws off-center lessens the liklihood that the top cross bar might split.

Boyd Hagen

Lettering the trellis parts makes for easier setup; setting the A-frame 8 in. into the ground makes for a sturdy trellis.

Janet Jemmott

Download the trellis project plan (pdf).

Photo: Michael Gellatly

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by Peter Coe
July 1997
from issue #9

I designed this A-frame trellis to be a freestanding, stable structure that could be taken apart and stored over the winter. If treated with a wood preservative and stored in a dry place, the trellis will last 5 to 10 years. I grow five tomato plants on each 10-ft. long trellis. With any luck, and good weather, the plants will reach the top bar by August.

Download the trellis project plan (pdf).

Helpful hints
1. Don't forget to cut and place those right-angle blocks. They provide structural stability that keeps the trellis from racking.

2. Drill pilot holes in the braces of the A-frame; put the screws in later.

If you want to use wood preservative, do so before assembly. If you don't want to treat the wood, you can use redwood, ceddar, white oak, or locust, all woods that'll take the elements for some time.

4. Steel pins are durable and strong, but if you don't want to cut steel rod, use 1/4-in. wooden dowels. Bevel the edges so the dowel will fit in with a few taps of a hammer.

5. It's easiest to assemble the A-frames on a flat surface. Then, when you're ready to put the whole trellis together, have someone hold up the A-frames while you line up the holse in the ends of the trellis bars with the pins.

Materials
• 1 8-ft. 2x4
• 1 10-ft. 2x4
• 2 12-ft. 2x3s
• 1 10-ft. 2x3
• 3/8-in steel rod (sold in 36-in. lengths), or 1/4-in. wooden dowels about 1 ft. long.
• 26 2-1/2-in. galvanized drywall screws, about 1/4 lb.
• 2 4-in. galvanized drywall screws
• Nylon mason's twine or durable string.

Tools
• Tablesaw with a miter gauge, a compound miter saw, or a protractor and handsaw
• Drill with 3/16-in. and 3/8-in. drill bits
• Phillips screwdriver
• Hacksaw and file, if using steel rod

Learn more about the advangages of trellising tomatoes...

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Comments (2)

Pete_99 writes: I built this trellis, roughly following your plan, and it's still early in the season so we'll have to see how it works out (been cool and rainy here -- not the best tomato weather). I did a few things differently, though -- first, I canted the ends in a bit, by making the top chord shorter than the bottom. This gave me better stability, I think, and less likelihood to sway to either end. Second, I put strips of lattice up across the end struts in order to use them as additional trellis space in my cramped community garden. I think this adds potential to your design in any situation. Finally, I used these strips to tie horizontal strings (woven on either side of the vertical strings) to add more plant support.

I'll let you know how it works out. Thanks for the idea. Passersby sure seem to like it.

Pete
Boston, MA
Posted: 2:20 am on July 2nd

pinkgingerlily writes: Love the twine idea! And your trellis is beautiful.. but for those of us without tools and cash for wood there is a cheaper way. Lots of Crazy people in the south have planted bamboo...its pretty until it gets 15ft. tall and takes over. Then they are looking for someone to cut it and take it away. It can be cut with just about any kind of saw. people are happy if you take a little or alot. I tie it together with wire which is easily taken apart in the fall. Last yr. I made about several sections about 8ft. long and 7ft.high. It did partially blow down when Hurricane Ike came through so this yr. I will stake the corners. Sorry I don't know how to do the picture thing.
Posted: 5:38 pm on March 20th

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