Colocasia Gaoligongensis

By Alternativeeden @markngaz
One plant that has really come into its own for us this year is Colocasia gaoligongensis, which despite the tongue twister of a name really is an essential hardy plant for an exotic garden. It is often reported to be the hardiest Colocasia available, and can survive temperatures as low as -10C. It dies back to the ground in winter, only to re-emerge in the spring. We had one survive through the spate of bad winters the UK had from between 2009 and 2011. To be safe it is worth giving it a thick layer of mulch over winter. It likes to be in a moist soil with some shade. We actually lost a plant to drought that had survived the bad winters but was in a very dry spot.

This plant is in the raised bed next to the filter house, and as a very small plant in a pot survived being frozen solid last winter. It really is quite a tough plant.


Colocasia gaoligongensis in our garden

As you can see the leaves are quite a bright green with an almost black dot in the center of the leaf plus quite a pronounced veining to them. It produces surface runners (stolons) that will spread out quite some distance from the mother plant that will grow "pups" (new plants) at the end when they anchor themselves into the soil. We have had it flower but somehow have managed to not take any photos of it before, however it produces a fairly typical aroid flower. 

Colocasia gaoligongensis flower illustrated on http://www.hort.net


Colocasia gaoligongensis can also be propagated by cutting off the stolons, these can be cut into sections between the nodes. Once cut they should be allowed to dry off slightly, for about a day before placing them horizontally in seed trays with a good quality multi purpose compost. They should be given a light covering of compost and kept moist but not waterlogged. If you can give them a little bit of bottom heat them they will respond well.  Once the plants sprout, allow them to grow on until late the following spring when they can be divided and potted on. It will grow reasonably quickly so small new plants will get to a good size quite quickly if kept moist and well fed. 

I'm really hoping this bulks up nicely next year and gives us a number of spare plants to put in other places in the garden.

Gaz