Calla lilies, with their striking white and purple blooms, can be a beautiful addition to any outdoor space. While they are typically grown indoors, with proper care, they can thrive in outdoor environments as well. Here, we will discuss how to care for potted calla lilies outdoors, ensuring they remain vibrant and healthy throughout the growing season.
Before we delve into the specifics of outdoor care, let’s briefly discuss why you might want to consider growing calla lilies outdoors. Not only do they add a touch of elegance to your landscape, but they are also relatively low-maintenance and can tolerate a range of conditions. They come in various colors, including shades of white, purple, and even orange, providing ample opportunity to add pops of color to your outdoor space.
Choosing the Right Outdoor Location
When selecting a location for your potted calla lilies, consider their preferences for light and temperature. Calla lilies prefer bright, indirect light, making partially shaded spots, such as under trees or eaves, ideal. They can tolerate full shade but may produce fewer flowers under these conditions.
Temperature-wise, they prefer cooler environments, with optimal growth occurring between 60-70°F (15-21°C). While they can tolerate higher temperatures, heat stress can cause them to wilt or drop leaves. Therefore, it’s best to avoid full sun exposure during the hottest parts of the day.
Container Selection
Choosing the right pot is crucial for the health of your calla lilies. They prefer well-draining pots, as they hate having their roots sit in water. Ensure the pot has drainage holes to prevent root rot.
Additionally, consider the size of the pot. Calla lilies prefer to be slightly root-bound, so a pot that is too large can lead to waterlogging, while a pot that is too small may not provide enough space for their root system.
Soil and Watering
The ideal soil for calla lilies is well-draining and rich in organic matter. You can achieve this by mixing peat moss or compost into your garden soil or purchasing a pre-made potting mix designed for acid-loving plants, as calla lilies prefer slightly acidic soil.
Watering is another critical aspect of their care. While calla lilies like evenly moist soil, they dislike being waterlogged. Allow the top inch of soil to dry out between waterings. This will encourage root growth and prevent fungal diseases. Always use pots with drainage holes to facilitate this.
Temperature and Humidity
As mentioned earlier, calla lilies thrive in cooler temperatures. If you live in a warmer climate, consider providing some shade, especially during the hottest part of the day. You can also move the pots indoors during extreme heat or cold snaps.
In terms of humidity, calla lilies prefer higher humidity levels, around 60-70%. If the air in your area is particularly dry, consider grouping the pots together to create a humid microclimate or misting them regularly.
Fertilizing
Calla lilies benefit from regular fertilization during their growing season. Use a balanced, water-soluble fertilizer every 4-6 weeks, following the package instructions. Alternatively, you can use a slow-release fertilizer at the beginning of the season and top-dress with compost or other organic materials.
However, be cautious not to overfertilize, as this can lead to excessive foliage growth at the expense of flowers. If your plant is not producing many flowers, reducing fertilizer frequency or amount may encourage blooming.
Pruning and Repotting
Calla lilies do not typically require pruning, except to remove dead or damaged leaves. This can be done at any time throughout the growing season. However, it’s best to avoid pruning the flower stalks, as this can discourage further blooming.
As for repotting, it’s usually only necessary every 2-3 years, once the plant has outgrown its current pot. This is typically indicated by roots circling the inside of the pot or water pouring out of the drainage holes as soon as you water the plant. When repotting, choose a slightly larger pot and freshen up the soil with new potting mix.
Remember, while calla lilies can tolerate a range of conditions, they thrive with consistent care tailored to their preferences. By providing them with the right environment and maintenance, you can enjoy their beautiful blooms throughout the growing season. Happy gardening!
