The centre also wants people to learn about the online Waikato Sustainable Events Calendar - www.sustainableevents.org.nz.
It is a resource to publicise sustainable activities and events in the region, from the Coromandel to Mokau and Taumarunui.
The calendar is a co-operative venture between four councils: Hamilton City, Waikato and Waipa Districts and Waikato Regional Council. It is free to use for community groups, businesses, and individuals.
During the open day there will be family-friendly activities including badge making, a sausage sizzle, honey tasting and live music. There will be talks and practical activities on topics such as growing seedlings, worm farming, keeping chickens and bike maintenance.
The Environment Centre is a drop-in centre where people can get advice, information or resources on a wide range of environment-related issues. The centre sells worm bins, bokashi buckets and honey, and Ruth is expanding the retail range. "We're sourcing products that support people to live more sustainably and to reduce rubbish," she says.
A new feature of the Environment Centre attracting attention from passers-by is the exchange table in the window.
"People can bring items of any kind to the table and swap them for something else," Ruth says.
Currently the table features several kinds of home-grown fruit, herb seedlings, free-range eggs, and strawberry plants.
The Environment Centre is also a recycling hub, where people can bring used toner cartridges and light bulbs to be recycled instead of going into a landfill.
Another new feature is a curtain bank. Ruth is looking for donations of unwanted curtains.
"I see the Environment Centre as a catalyst for creative social change, towards a more environmentally friendly and sustainable society," says Ruth.