Tubestock is the plural term for young plants ready for revegetation

Revegetation

Revegetation is the process of replanting and rebuilding the soil of disturbed land. This may be a natural process produced by plant colonization and succession, or an artificial , accelerated process designed to repair damage to a landscape due to wildfire, mining, flood, or other cause...

. Tubestock go through a process which involves a large consumption of water. The plastic

Plastic

A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...

 tubes that the plant grows in are about 8 cm tall with a diameter of 4.25 cm are tightly filled with potting mix peat moss and vermiculite and a top dressing of a little slow release fertiliser. Local native seeds are preferable for any revegetation, and are sprinkled on top of the soil and snail/ slug pellets. The plants are then watered daily. They can be kept in the tubestock pots for up to a month or two before the plants start to become rootbound (depending on plant species), in which case the pot will need to be soaked in water

Water

Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...

for 10-15 mins to loosen the roots in order for it to be easily removed from the pot without damage.