You can grow calla lilies indoors in containers or outdoors in your garden. In areas with warmer climates (zones 9 to 11 in the United States), calla lilies grow perpetually all year round. In colder climates, calla lilies can be grown as annuals or extracted in the fall to replant them the following year.
Steps
Method 1 of 3: Start the Calle in the Vases
Step 1. Start the calla lilies from the tubers or rhizomes
Although they can be started from seed, it takes a long time and calla seeds do not have a high germination rate.
Step 2. Plant dormant tubers in 6-8 "pots a few weeks before the last expected frost in your area
If you live in a warm climate, or the threat of frost has already passed, you can plant the tubers directly in the garden.
Bury the tubers 7.5 to 10cm below the soil surface
Step 3. Place the pots in a sunny window
Keep the soil moist until the plants begin to grow and it's time to put them in the garden or transplant them into larger containers.
Method 2 of 3: Planting the Calle outside
Step 1. Choose an outdoor location that is partially exposed to the sun and retains moisture if you live in a very hot climate
Choose an area with full sun and humidity if you live in a colder region.
Step 2. Prepare the ground for the Calle
Work the soil before planting and enrich it with organic mulch to help retain moisture. This is especially important if you have stony or sandy soil.
Step 3. Transplant the started plants or tubers into the soil once there is no threat of frost
Space the plants at least 30 cm from each other. Some calla lilies grow to 1.2m high, with leaves 30cm or more wide
Step 4. Water the plants well and keep the soil moist during the growing season
Step 5. Fertilize the flowers regularly using a general water soluble plant fertilizer
You may need to fertilize more than normal when the plants are forming their flowers.
Step 6. Stop watering and feeding plants at the end of the growing season
In this way the soil dries up and the plants die. Even if you live in a warm climate, calla lilies need a period of winter hibernation to bloom again the following year.
Step 7. If you live in a cold climate, pull the calla lilies out of the earth before the first frost
Grab the plant close to the ground and gently rock back and forth until the soil loosens around the base, then pull out the tuber.
Step 8. Sift the soil with your hands or gently turn it over with a scoop to find small tubers that form underground and haven't had time to grow
Step 9. Cut all the remaining plant material from the tubers, then lay them in the sun to dry for a couple of days
Step 10. Store the tubers in dry peat in a paper bag
Keep them at 10 - 13 degrees C).
Step 11. Divide the groups into single tubers before planting them in the spring
Method 3 of 3: Grow Calle in Containers
Step 1. Start your dormant tubers in 40cm or larger pots if you want to grow the flowers in containers
Even if the root system of calla lilies does not spread much, using a large pot helps the soil stay moist and allows enough space for the tubers to spread and for other plants to grow.
Step 2. Use potting soil with basic organic mulch or enrich the soil with organic matter before planting
Step 3. Keep the containers indoors
Calla lilies grow well at floor level near large windows or glass doors where they can get a lot of sunlight.
Step 4. Move the plants outside after all signs of frost have passed if you want to grow them outdoors in planters
Calla lilies grown in planters are nice additions to gardens, patios, porches and patios.
Step 5. Water the plants regularly and make sure the soil stays moist
Plants grown in containers dry out faster than plants that grow in the soil.
Step 6. Fertilize potted calla lilies with an all-purpose plant fertilizer as soon as the buds develop
Step 7. Stop watering and feeding plants at the end of the growing season to allow them to go into dormancy
Step 8. Cut the plants down to ground level and bring the pots indoors for the winter if you live in a cold climate
Store the pots in a cool, dark area that is no colder than 4.4 degrees C. Or, you can take the tubers out of their pots and store them in peat moss for the winter.