Do 3D printed planters need a drainage hole?

Yes, unless you are using it as a cachepot with a nursery pot inside. A sealed pot leaves water sitting at the bottom out of sight, and root rot is what kills most plants in printed pots. Add feet too, so the hole is clear of the surface and can actually drain.

Are 3D printed planters waterproof?

Not by default. Water finds the gaps between layers and weeps through the wall slowly enough that people blame the plant. Four or more perimeters and finer layers help a lot; brush-on epoxy inside makes it genuinely watertight; or just use it as a cachepot.

What filament is best for a planter?

PETG for anything that gets watered, and PETG or ASA outdoors. PLA slowly degrades in constant damp and warps in a sunny window.

What size should I make it?

Measure the nursery pot rather than the plant, and add a couple of millimetres of clearance. The dimensions shown are real millimetres, so check them before printing.

Planter Generator · Turn Any STL Into a Planter

Planter Generator - Turn Any STL Into a 3D-Printable Planter

Your model

Scale your model

Runs once on upload already; use this again after you've rotated it by hand.

Planting cavity

Hole shape

⬤ Round ▬ Rectangular

Insert Ø

Height

Cut top flat

Cut the top off for a clean rim

Measured down from the highest point of the model.

Drainage & extras

Drainage hole Drainage feet Drip tray (saucer)

Advanced settings

Wall taper

0° = straight walls. Positive = wider at top.

Hole position

X mm

Z mm

What you get

A printable planter built from your own model or from the shape controls: a pot with a real drainage hole, an optional drip tray, and feet so the base is not sitting in a puddle. Sizes are true millimetres, so it fits the plant you actually have.

Drainage is the whole design

Nearly every dead houseplant in a printed pot died of root rot, not neglect. A sealed pot has nowhere for water to go, so the roots sit wet.

Always print the drainage hole. A pot without one is a cachepot: put a nursery pot inside it, do not plant into it.
Feet or a tray, ideally both. Feet lift the hole clear so water can actually leave; the tray catches it.
Bigger is safer than smaller. One larger hole drains better than several small ones, which clog with compost.

Waterproofing a printed pot

FDM prints are not watertight by default. Water finds the gaps between layers and weeps out through the wall, which is slow enough that people blame the plant rather than the pot.

Approach	Effort	Result
Nursery pot inside, planter as a cachepot	None	Completely reliable, and the usual answer
4+ perimeters, 0.16 mm layers	Low	Much better, not guaranteed
Brush-on epoxy or pond sealer inside	Medium	Genuinely watertight
Plastic liner or a bin bag offcut	Low	Works, looks less good

Print settings

Setting	Use	Why
Material	PETG for anything watered	PLA slowly degrades in constant damp, and warps in a sunny window
Walls	4 perimeters	Watertightness comes from perimeters, not infill
Layer height	0.16 to 0.2 mm	Finer layers leave fewer paths for water
Infill	10 to 15%	The walls carry the load
Supports	None	A pot prints base-down with no overhangs
Outdoors	PETG or ASA	PLA fails quickly in UV and heat

Common problems

Water seeps through the walls

Normal for an FDM print. Add perimeters and print finer, seal the inside with brush-on epoxy, or use the pot as a cachepot with a nursery pot inside it. The last option is free and never fails.

The plant died even though I watered it

Usually root rot from no drainage. If the pot has no hole, water pools at the bottom out of sight. Print the hole, add feet so it can drain, and let the compost dry between waterings.

The pot warped in the window

PLA in direct sun. A sunny windowsill gets hot enough to soften it. Reprint in PETG or ASA.

It is too small once the plant is in it

Measure the nursery pot, not the plant, and add a couple of millimetres of clearance. The on-screen dimensions are real millimetres, so check them before printing rather than judging from the preview.

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