Materials

9cm terracotta pot (leave the label covering the hole on for now)

11cm terracotta saucer - the pot should fit nicely upside down inside the saucer

Two 4mm barbed tees

Four 3/16" M5 fibre washers (two shown - we added washers inside in a later modification)

Two short lengths of bamboo skewer that fit snugly into tees - some tees need the pointy end, and some the round end

13mm poly tubing as trunk line

4mm drip irrigation tubing

One 4mm tap

Some 4mm joiners to go from 13mm to 4mm

4mm plugs

Spike to make holes in 13mm tubing

Water tank (shared between runs)

Connectors from 13mm tubing to water tank (shown here is an earlier version with 4mm line - 13mm is much better)