If the area where you put the plant is too dim, your calla lily may be smaller and the flower stem may not be as strong. [2] X Research source

Don’t oversaturate the plant, though—this will lead to root rot. If the top 2–4 in (5. 1–10. 2 cm) of the soil still seems moist, you don’t need to water your calla lily yet.

Keep your plant away from heating and air conditioning vents, as these areas tend to have more fluctuations in temperature.

Add more water to the tray every few days or whenever it dries out. You can also mist your calla lily with a fine spray of water every few days if you don’t want to make a humidity tray. Alternately, you could run a cool-mist humidifier to keep the air in your home from drying out. [7] X Research source

Once your flowers have faded, stop fertilizing the plant. [9] X Research source

This is mostly just for aesthetic purposes, so you don’t have an unsightly dead flower or wilted stem in the middle of your plant.

Take care not to damage the roots when you transfer the plant.

If a child or animal does put the calla lily in their mouth, you might notice drooling and swelling of the lips, tongue, or throat. They might also have stomach pain and diarrhea. Call poison control or seek emergency care if you suspect calla lily poisoning.

If you’re still not sure, give the plant a little break from both fertilizing and watering. Wait until the soil is dry to about 4 in (10 cm) before you water it again, and skip fertilizing for 3-4 weeks.

You might need to repeat this a few times if the mites reappear.

If you prefer, you can spray the plant once a week with insecticidal soap, instead.

If your plant has stem rot, the stem will start to look soft and mushy, and your plant may start to lean over. If it has ring mosaic virus, you’ll notice a yellow discoloration that looks like stripes or spots on the leaves and stems.

Although you can stop fertilizing the plant as soon as the blooms wilt, it’s best to gradually decrease how often you water the plant rather than stopping abruptly. [19] X Research source

Your plant will grow new, healthy leaves in the spring.

Some gardening experts recommend adding just a little water to the soil every so often so the tubers don’t dry completely out.

The buds, also called eyes, will look like a small pointed tip on the rhizome. [24] X Research source Even if you’re planning to grow your calla lilies indoors, it’s best to start them about a month before your last frost. If you don’t divide the rhizomes, your calla lily will probably be too big for its pot. It might be less healthy as it grows, and it may have trouble standing upright.

If you want to plant more than one bulb in a single container, use a planter that’s 8 in (20 cm) or larger in diameter. Make sure your container has drainage holes or the roots of your plant will become waterlogged and rot. [26] X Research source Use the same size pot whether you’re planting a new calla lily bulb or you’re replanting one you separated after wintering.

Try using a potting mix that’s made of equal parts peat moss and perlite. Test the soil pH to make sure it’s slightly acidic—between 5. 5 and 6. 5 pH—and adjust it if you need to.

Plant the largest, firmest rhizomes you have available—these will produce stronger, larger plants. [29] X Research source Usually, tubers will have one side that’s round and one side that has a pointed bud. [30] X Research source

Make sure the potting mix stays damp through the growing process.

If the spot you chose doesn’t get much sun, move the pot to a sunnier location once the shoots start to grow. Your calla lily should start to flower about 13-16 weeks after you repot the rhizome, depending on the type of plant you have and the general growing conditions.