Taking care of house plants
Cultivating a garden
Propagating plants
Flower/leaf pressing
Ikebana
Wreath making
Natural dyeing
Essential oil distillation
Spending time with animals
Walking/running/swimming/climbing (etc.) with mindful attention, outside
Shinrin-Yoku or forest bathing
Any of these practices, or yoga, or meditation outside
More on some of these on ‘practices’ and ‘resources’ pages