Yes, you can grow mushrooms in an outdoor plant box! Mushrooms thrive in shaded, moist environments, making an outdoor plant box a suitable option if conditions are right. Here’s how to do it successfully:

1. Choose the Right Mushroom Species: Some mushrooms, like oyster or wine cap mushrooms, adapt well to outdoor conditions. Avoid varieties that require strict indoor climate control.

2. Prepare the Plant Box: Ensure the box has good drainage and is placed in a shady spot. Fill it with a mix of compost, straw, or wood chips, depending on the mushroom type.

3. Inoculate the Substrate: Introduce mushroom spawn into the substrate. Mix it well and keep it moist but not waterlogged.

4. Maintain Moisture and Shade: Mushrooms need consistent humidity. Cover the box with a breathable cloth or mulch to retain moisture and protect from direct sunlight.

5. Harvest at the Right Time: Most mushrooms mature within a few weeks. Harvest them when the caps are fully open but before they start to dry out.

Growing mushrooms outdoors can be rewarding and requires minimal equipment. With proper care, your outdoor plant box can yield a delicious fungi harvest!