Best Filament for Planters – PLA vs PETG

I found that PETG is better than PLA for this job. In many cases, I achieved the result when PLA and even wood composite filament didn’t let water through when tested overnight. However, as PLA absorbs water, we may expect that over time water and sunlight will break in between the layers. There are some sealant solutions available to post-process PLA. Are these food-safe chemicals? Doubt so. As the result, it won’t work for the greens like spring onions, for example, but should be OK for flowers.

Therefore, PETG wins here as it comes from the PET material, a common material for plastic bottles, 100% waterproof and recyclable. The downside of PETG is that it doesn’t like retractions which should be no problem in the case of 3D printing plant pots. Read more about PETG …

PETG in brown and other colors.