Seeds of Paulownia Catalpifolia, Emperor Tree

Sowing **Paulownia catalpifolia** follows similar principles to other Paulownia species, but with some specificities. Here are the steps to successfully sow **Paulownia catalpifolia**:

### 1. **Seed Preparation**
- **Paulownia catalpifolia** produces small, light and fine seeds. As with other Paulownia varieties, it is advisable to stratify the seeds before sowing to improve germination.
- To do this, place the seeds in a plastic bag with damp sand and leave them in the refrigerator for about 4 to 6 weeks at a temperature of about 4°C. This stratification mimics winter and helps break the dormancy of the seeds.

### 2. **Soil preparation**
- **Paulownia catalpifolia** prefers well-drained, light, fertile, and slightly acidic to neutral soil (pH 6 to 7). It is crucial to avoid heavy, clayey soils that retain too much moisture.
- A mixture of light potting soil, sand and perlite or vermiculite is ideal for sowing in pots or seed trays.

### 3. **Sowing**
- **Sow the seeds on the surface**. Paulownia catalpifolia seeds need light to germinate, so do not cover them with soil. If you are sowing in pots or trays, you can simply scatter them on the surface of the soil.
- You can also sow directly in open ground if the climatic conditions are favorable, but this is less recommended because controlling temperature and humidity is more difficult.

### 4. **Germination conditions**
- The ideal temperature for germination is 20 to 25°C. Keep the environment warm and humid, but not too humid, to avoid mold.
- Humidity is essential, so it is advisable to keep the seedlings in a mini-greenhouse or under a plastic bell jar to maintain a microclimate conducive to germination. Make sure the seedlings have access to indirect light, but avoid direct sunlight.
- Seeds should germinate within 2 to 4 weeks, depending on temperature and humidity conditions.

### 5. **Seedling Care**
- Once the seeds have germinated, it is important to provide the seedlings with adequate light and good air circulation to prevent mold. Do not leave them in overly humid conditions once they have germinated.
- Water moderately to maintain good soil moisture. Do not let water stagnate in the pots, as this can lead to root rot.
- When the seedlings start to get bigger, you can gradually expose them to more light, but avoiding direct sun so as not to burn them.

### 6. **Transplanting and planting in open ground**
- When the young plants have developed several true leaves (about 10 to 15 cm in height), you can transplant them into larger pots or plant them in open ground.
- If you are planting them in the ground, make sure the location is well-drained and sunny, with fertile soil. Space the plants at least 2 to 3 meters apart so that they have enough room to grow.
- Planting in open ground can take place in spring or early summer, when the risk of frost has passed.

### 7. **Care after planting**
- **Paulownia catalpifolia** likes warmth and sun, so make sure the tree receives good sun exposure throughout its growth.
- Water regularly during the first few years to encourage good growth. The soil should be slightly moist but never soggy.
- To conserve moisture and limit weed growth, you can apply mulch around the base of the tree.

### 8. **Follow-up and maintenance**
- As the tree grows, it may need monitoring to ensure it is not overrun by weeds or pests.
- As **Paulownia catalpifolia** is a fast growing species, regular maintenance to promote healthy growth is recommended, particularly by pruning dead or poorly oriented branches.

By following these steps, you will maximize your chances of getting healthy **Paulownia catalpifolia** seedlings, and you will be well on your way to growing this great growing tree.