Self-Watering Pot Insert – 235 mm

Transform a standard flower pot into a self-watering planter with this easy-to-print insert. Designed to fit pots with an internal diameter of approximately 235 mm, this insert creates a water reservoir beneath the growing medium, helping maintain consistent moisture levels while reducing watering frequency.

Features

• Fits 235 mm pots (internal diameter)

• Integrated water reservoir beneath the soil

• Central fill tube for easy watering

• Multiple wicking openings allow moisture to move from the reservoir into the soil

• Elevated support structure keeps the soil above the water level

• Helps reduce overwatering and underwatering

• Suitable for houseplants, herbs, vegetables, and decorative plants

Recommended Print Material

PETG is strongly recommended due to its:

• Excellent moisture resistance

• Good UV and temperature stability

• Higher durability compared to PLA

• Better long-term performance in humid environments

PLA may work for indoor use but can soften or deform over time when exposed to moisture and heat.

Printing Recommendations

• Material: PETG

• Layer Height: 0.20–0.28 mm

• Wall Count: 3–4 walls

• Infill: 15–25%

• Supports: Not required

• Brim: Recommended for improved bed adhesion

• Print Speed: Moderate speeds for best surface quality and dimensional accuracy

How It Works

1. Place the insert inside a pot with an internal diameter of approximately 235 mm.

2. Fill the potting mix above the insert.

3. Pour water through the central fill tube until the reservoir is full.

4. Plant roots will access moisture through the openings and wicking action of the soil.

5. Refill the reservoir as needed through the fill tube.

Notes

• Designed for 3D printing without supports.

• PETG provides the best balance of strength, durability, and water resistance.

• Depending on your pot design and plant type, a small overflow hole may be added to prevent overfilling.

This self-watering insert is ideal for plant owners who want healthier plants with less frequent watering and a more consistent root-zone moisture level.