The optimal time to plant Anemone De Caen bulbs is during the fall or early spring. Fall planting is ideal in milder climates, as it allows the bulbs to establish their root systems and prepares them for a vibrant display of blooms in the following spring.

In colder climates, it's better to plant the bulbs in early spring once the ground has thawed and the threat of frost has passed. Planting in early spring ensures that the bulbs have enough time to grow and flower before the summer heat arrives.

So actually it is a personal preference, because you can plant Anemones a few times in the year and they will bloom within a few months after planting.

Anemone bulbs should be planted at a depth of around 1-2 inches, with a spacing of about 3-4 inches between each bulb. Planting bulbs too shallowly can expose them to frost damage, while planting them too deeply can prevent them from growing and blooming properly. It's important to avoid planting bulbs too close together, as this can lead to overcrowding and reduced blooming.

Anemones prefer well-draining soil that is rich in organic matter. While they can tolerate a range of soil types, they will not thrive in heavy or waterlogged soil. The addition of compost or other organic matter can help to improve soil quality and ensure optimal growing conditions for the bulbs. Anemones also prefer a soil pH that is slightly acidic to neutral, typically between 6.0 and 7.0.

Anemones are generally considered to be deer and rabbit resistant, as these animals tend to avoid eating their foliage and flowers. However, this can vary depending on the local wildlife population and the availability of other food sources. In areas with high populations of deer and rabbits, it may be necessary to protect anemones with fencing or other barriers to prevent damage.

After anemones have bloomed, it's important to allow their foliage to die back naturally. This process allows the bulbs to store energy for the next growing season. Avoid cutting back the foliage until it has turned yellow and begun to wither.

Once the foliage has died back, it can be removed from the plant. Throughout the growing season, anemones should be watered regularly and fed with a balanced fertilizer in early spring to encourage healthy growth. You can leave Anemone bulbs in the ground, but be sure to leave a protective layer of mulch during the cold winter months.