growing evergreens in containers - Ask Extension
Please send dos and don'ts for growing evergreens on containers.
Location: less than 10 feet from house facing west
I would like to buy species that...
Knowledgebase
growing evergreens in containers #879583
Asked July 31, 2024, 12:44 PM EDT
Please send dos and don'ts for growing evergreens on containers.
Location: less than 10 feet from house facing west
I would like to buy species that do not have to be burlap wrapped in winter
Is it essential the planters are made of concrete or cast iron?
Anoka County Minnesota
Expert Response
Hardiness is an issue and so is the ability of the container to not break in the winter. The container also cannot heat up so much that it warms the soil enough to trigger the tree to break dormancy before spring. The container must be large enough to buffer the effects of weather.
https://blog.davey.com/can-you-grow-evergreens-in-a-container/
https://www.containedcreations.com/blog/using-evergreens-in-container-gardens
https://extension.umn.edu/trees-and-shrubs/choosing-evergreens-your-landscape#evergreens-for-zone-4-851912
Growing evergreens in containers in USDA Hardiness Zone 4, which experiences cold winters with minimum temperatures between -30°F and -20°F, has its advantages and disadvantages:
### Pros:
1. **Mobility:** Containers allow you to move the evergreens to more sheltered locations during extreme weather conditions, potentially protecting them from the harshest cold.
2. **Control Over Soil:** You can choose the ideal soil mix for your evergreens, which can be particularly beneficial if your garden soil is not suitable.
3. **Space Utilization:** Containers are great for small gardens, patios, or balconies where planting in the ground isn't possible.
4. **Aesthetic Flexibility:** They offer design flexibility, allowing you to rearrange your plants to suit your aesthetic preferences or seasonal changes.
5. **Pest Management:** Containers can help reduce problems with soil-borne pests and diseases.
6. **Specific Microclimates:** You can create specific microclimates by moving containers to optimal locations for sun, shade, or wind protection.
### Cons:
1. **Winter Protection:** Even hardy evergreens can suffer root damage in containers during extremely cold temperatures since the roots are more exposed than they would be in the ground. Containers provide less insulation.
2. **Watering Needs:** Containers dry out more quickly than garden beds, requiring more frequent watering, which can be challenging during hot summers or if the containers freeze in winter.
3. **Limited Growth:** The growth of evergreens in containers can be restricted by the limited space for root expansion, potentially leading to stunted growth or the need for frequent repotting.
4. **Weight and Portability:** Large containers filled with soil and mature plants can be heavy and difficult to move.
5. **Nutrient Management:** Plants in containers can quickly exhaust the nutrients in the soil, necessitating regular fertilization.
6. **Vulnerability to Temperature Fluctuations:** Container plants are more susceptible to temperature swings, which can stress the plants.
By carefully selecting hardy evergreen varieties, using appropriate containers, and providing winter protection, gardeners can successfully grow evergreens in containers in Zone 4.
Conventional wisdom is that growing a tree in a container will fail. If winters remain unpredictably warm it may succeed until the winter drops below freezing for even one night.
https://yardandgarden.extension.iastate.edu/how-to/overwintering-unplanted-trees-shrubs-and-perennials
If you can afford disappointment it could be a fun experiment.
https://blog.davey.com/can-you-grow-evergreens-in-a-container/
https://www.containedcreations.com/blog/using-evergreens-in-container-gardens
https://extension.umn.edu/trees-and-shrubs/choosing-evergreens-your-landscape#evergreens-for-zone-4-851912
Growing evergreens in containers in USDA Hardiness Zone 4, which experiences cold winters with minimum temperatures between -30°F and -20°F, has its advantages and disadvantages:
### Pros:
1. **Mobility:** Containers allow you to move the evergreens to more sheltered locations during extreme weather conditions, potentially protecting them from the harshest cold.
2. **Control Over Soil:** You can choose the ideal soil mix for your evergreens, which can be particularly beneficial if your garden soil is not suitable.
3. **Space Utilization:** Containers are great for small gardens, patios, or balconies where planting in the ground isn't possible.
4. **Aesthetic Flexibility:** They offer design flexibility, allowing you to rearrange your plants to suit your aesthetic preferences or seasonal changes.
5. **Pest Management:** Containers can help reduce problems with soil-borne pests and diseases.
6. **Specific Microclimates:** You can create specific microclimates by moving containers to optimal locations for sun, shade, or wind protection.
### Cons:
1. **Winter Protection:** Even hardy evergreens can suffer root damage in containers during extremely cold temperatures since the roots are more exposed than they would be in the ground. Containers provide less insulation.
2. **Watering Needs:** Containers dry out more quickly than garden beds, requiring more frequent watering, which can be challenging during hot summers or if the containers freeze in winter.
3. **Limited Growth:** The growth of evergreens in containers can be restricted by the limited space for root expansion, potentially leading to stunted growth or the need for frequent repotting.
4. **Weight and Portability:** Large containers filled with soil and mature plants can be heavy and difficult to move.
5. **Nutrient Management:** Plants in containers can quickly exhaust the nutrients in the soil, necessitating regular fertilization.
6. **Vulnerability to Temperature Fluctuations:** Container plants are more susceptible to temperature swings, which can stress the plants.
By carefully selecting hardy evergreen varieties, using appropriate containers, and providing winter protection, gardeners can successfully grow evergreens in containers in Zone 4.
Conventional wisdom is that growing a tree in a container will fail. If winters remain unpredictably warm it may succeed until the winter drops below freezing for even one night.
https://yardandgarden.extension.iastate.edu/how-to/overwintering-unplanted-trees-shrubs-and-perennials
If you can afford disappointment it could be a fun experiment.
