Althaea off. Common marsh mallow

Althaea officinalis, commonly known as Common Marshmallow, is a perennial plant known for its soft, downy leaves and pale pink flowers. Here's a guide on how to grow Althaea officinalis in your garden:

**1. Climate and Site Selection:**
- Common Marshmallow prefers a sunny location but can tolerate partial shade. It grows well in USDA hardiness zones 3-9. Choose a site with well-drained soil, as it doesn't like to be waterlogged.

**2. Soil Preparation:**
- Prepare the soil by adding organic matter, such as compost or well-rotted manure. Marshmallow plants prefer soil with a slightly acidic to neutral pH.

**3. Planting Time:**
- Plant Common Marshmallow in the spring or early fall. You can start from seeds or purchase young plants from a nursery.

**4. Propagation:**
- Marshmallow can be grown from seeds or propagated by dividing established plants. Seeds can be started indoors 6-8 weeks before the last expected frost and then transplanted outdoors.

**5. Planting Depth:**
- If planting from seeds, sow them at a depth of about 1/4 to 1/2 inch (6-13 mm). Ensure good soil contact for the seeds.

**6. Spacing:**
- Space Marshmallow plants about 2-3 feet apart to allow for their mature size.

**7. Watering:**
- Keep the soil consistently moist, especially during the plant's establishment period. Once established, Marshmallow is relatively drought-tolerant.

**8. Mulching:**
- Apply a layer of organic mulch around the plants to help retain soil moisture, suppress weeds, and regulate soil temperature.

**9. Fertilization:**
- Marshmallow doesn't require heavy fertilization. A balanced, all-purpose fertilizer applied in spring is usually sufficient.

**10. Support:**
- Provide support for the tall stems, especially when the plant is in bloom. You can use stakes or grow the plants against a fence for support.

**11. Pruning:**
- Prune the plants back in late fall or early spring to encourage bushier growth. Remove any dead or damaged growth.

**12. Flowers and Harvesting:**
- Common Marshmallow produces pale pink flowers in late summer to early fall. Harvest the roots in the fall of the second year or later, after the plant has established. The roots are typically used for medicinal purposes.

**13. Wildlife Attraction:**
- Marshmallow flowers attract bees and other pollinators to your garden.

**14. Winter Care:**
- Common Marshmallow is a hardy perennial, and established plants generally don't require special winter care. Mulching around the base of the plant can help protect it during harsh winters.

**15. Medicinal Uses:**
- Common Marshmallow has a history of medicinal use, particularly for its mucilaginous properties. The roots are traditionally used, and they are often dried and used to make infusions or teas.

Keep in mind that while Common Marshmallow is generally considered safe for medicinal use, it's essential to consult with a healthcare professional before using any plant for medicinal purposes. Additionally, be aware that Common Marshmallow is not the same as the modern confectionery marshmallow, which is typically made from sugar, gelatin, and other ingredients.