This year I am trying something a little different for my kumara tipu. I have an old bath in my hot house which I have turned into a wicking bed.
By putting a short piece of pipe snugly into the plug hole the bath will now hold water up the the top of the pipe.
I then covered the pipe with a small plant pot to stop the pummice from blocking the pipe.
I have filled the bath up with pummice to warm up. In a few weeks when the weather warms a little more I will put my seed kumara about 15 centimeters under the pumice.
Warm, regular moisture, pumice for setting roots -we will see how it goes.