Weekend warriors, this one is for you. A clean wooden planter box is one of the easiest builds that makes your patio or front porch look instantly better — and you can knock it out before lunch.
What You Need
- 4 cedar fence pickets (6 ft, about $3 each)
- 1.5-inch exterior screws (1 box)
- Drill/driver
- Saw (miter saw is easiest, hand saw works)
- Measuring tape + pencil
- Sandpaper (120 grit)
- Optional: exterior wood stain or sealant
Total cost: ~$20-25
The Build
Step 1: Cut Your Pieces
For a 24" x 12" x 12" planter:
- 2 long sides: 24" x 12"
- 2 short sides: 10.5" x 12" (accounting for board thickness)
- Bottom slats: 3-4 pieces at 22.5" long
Step 2: Assemble the Box
- Stand two long sides and two short sides on edge
- Pre-drill holes to prevent splitting (cedar is soft but can crack)
- Drive 2-3 screws per corner joint
- Flip it over, lay bottom slats across with ~1/4" gaps between them for drainage
- Screw bottom slats in place
Step 3: Sand and Finish
Give everything a quick sand to knock down splinters. Cedar naturally resists rot, so you can leave it raw — it will weather to a nice silver-gray. Or hit it with a coat of exterior stain if you want to keep the warm color.
Pro Tips
- Drill drainage holes if your bottom slats are tight — waterlogged roots kill plants fast
- Line with landscape fabric to keep soil from washing through gaps
- Elevate slightly off the ground with small feet or furniture pads to prevent bottom rot
- Cedar over pine — it lasts 5x longer outdoors without treatment
What to Plant (March Edition)
If you are in zones 6-9, you can plant right now:
- Lettuce, spinach, kale (cool weather crops)
- Herbs: cilantro, parsley, chives
- Pansies or violas for color
When Things Go Wrong
Split a board? Screws not biting? Not sure if your wood is actually cedar? Before you make a hardware store run, try snapping a photo and asking Fixy — it is a free AI app that diagnoses home repair and DIY problems from photos and descriptions. Handy for quick gut-checks mid-project.
Simple build, big payoff. Drop a comment if you build one this weekend — bonus points for plant pics. 🌱
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