Obsession™ Nandina

We live in Zone 4--southern Wisconsin, and surprisingly they sell the Obsession nandina here. They're planted on the south side of our house. I'm just concerned about our winter temps which can go to minus 10. Can you offer advice about protecting them?

Obsession Nandina (Nandina domestica 'Obsession') is typically hardy in USDA Zones 6-10, which means it may struggle with the colder temperatures you experience in Zone 4, where winter lows can reach -10°F or lower. However, since you've planted them on the south side of your house, they will benefit from some additional warmth and protection. Here are some steps you can take to help your Obsession Nandina survive the winter:

Winter Protection Tips:

1. Mulching:

   • Apply a thick layer of mulch (2-4 inches) around the base of the plants. This will help insulate the roots and retain moisture in the soil. Use organic mulch like straw, leaves, or pine needles.

2. Wind Protection:

   • Protect the plants from cold winter winds, which can cause desiccation (drying out). If your south side is exposed to strong winds, consider using burlap screens or windbreaks to shield the plants.

3. Burlap Wrapping:

   • For additional protection, especially during the coldest months, you can wrap the plants in burlap. This will help protect the foliage from cold winds and extreme temperatures. Ensure the wrapping is secure but not too tight, allowing some air circulation.

4. Watering Before Freeze:

   • Water the plants deeply before the ground freezes. This helps ensure that the plants have enough moisture to survive through the winter.

5. Temporary Covering:

   • During extremely cold spells, consider temporarily covering the plants with frost blankets or even old sheets. Remove the coverings during the day when temperatures rise to allow sunlight to reach the plants.

6. Monitoring:

   • Keep an eye on the weather forecast. If an exceptionally cold snap is expected, take extra precautions with additional coverings and insulation.

Spring Recovery:

• If the plants do suffer some winter damage, they may still recover in the spring. Prune away any dead or damaged branches once new growth starts to emerge.

Summary:

While Obsession Nandina is not ideally suited for Zone 4, with proper winter protection measures, you can increase the chances of your plants surviving the cold Wisconsin winter. The south-side location will help, but additional insulation, wind protection, and monitoring will be key.

Is the Obsession Nandina tolerant in the north east. In long island, New York to be exact. Thank you for your time

Yes, Obsession Nandina (Nandina domestica 'Seika') can be grown on Long Island, New York, which is in USDA Hardiness Zones 7a to 7b. Since Obsession Nandina is hardy to Zones 6-10, it should be well-suited to your area.

Considerations for Growing Obsession Nandina on Long Island:

1. Cold Tolerance: The plant is cold-hardy enough for Long Island's climate, so it should handle winter temperatures without significant issues.

2. Sunlight: Obsession Nandina prefers full sun to partial shade. In the Northeast, planting in a spot with at least 4-6 hours of sunlight per day will ensure good growth and vibrant foliage color.

3. Soil and Drainage: This plant prefers well-drained soil. If your area has heavy clay or poorly draining soil, consider amending it with organic matter or planting in raised beds.

4. Winter Considerations: While the plant is hardy, extreme cold snaps or drying winter winds could cause some leaf drop or browning. Providing some winter protection, like a light mulch layer, can help minimize stress.

Overall, Obsession Nandina should thrive in your Long Island garden with the proper care.