The plantings have been popular with a record-breaking 180 people at the first one at Waitangi Park on May 26, he said.
"They've been going really well.
"This weekend just gone the plants were all planted in a short time."
Having community support had been very beneficial and helped council in its effort to restore the environment, Cave said.
"It's an exciting direction that the regional council and community are going in.
"Momentum is building and continuing to build."
The Plant Thru Winter programme encourages people to play an active part in the environment, while highlighting the environmental enhancement work being done by tangata whenua, schools and farmers.
The main focus is on the Karamu Stream, which drains a large portion of the Heretaunga Plains including city stormwater and runoff from rural land.
As a result, water quality in the stream remains poor, but planting the edges and wetlands will help to improve this, while new trees also improve habitats for birds, insects and fish.
The regional council has also identified places in the Karamu catchment where a significant difference could be made with extra work.
Next Saturday 5000 plants will be planted at Waitangi Regional Park during a public planting organised by Napier Forest & Bird from 9am to 12pm.
Visit www.hbrc.govt.nz to register.
