Shadow Harvest: Cultivating Black Onions with the Grow Box

Growing black onions from seeds in a plastic pot can be a rewarding experience. Here's a step-by-step guide using the provided materials:
1. Prepare the Pot: 
- Fill the plastic pot with the ready-to-use potting mix, leaving some space at the top for watering.

2. Sow the Seeds: 
- Plant the black onion seeds in the potting mix according to the depth and spacing instructions on the seed packet.
- Cover the seeds with a thin layer of potting mix and gently pat it down.

3. Watering: 
- Water the potting mix thoroughly after planting to ensure the seeds are moistened. Avoid overwatering, as it can lead to rotting.
- Keep the soil consistently moist but not waterlogged throughout the germination and growing period. 

4. Location: 
- Place the pot in a location that receives full sun. Onions prefer well-draining soil and plenty of sunlight.
- Ensure there is good air circulation around the pot to prevent fungal diseases.

5. Fertilization: 
- Dilute the concentrated root fertilizer according to the package instructions.
- Apply the diluted fertilizer to the soil around the base of the seedlings once they have established and developed a few sets of true leaves.

6. Nutrification: 
- Use the plant nutrifier spray according to the instructions on the package. This will provide additional nutrients to support the healthy growth of the onions.

7. Maintenance: 
- Use the scraper tool to remove any weeds or debris from the surface of the soil without disturbing the seedlings.
- Apply bug deterrence powder around the base of the pot to deter pests. Follow the instructions on the package for proper application.

8. Thinning and Transplanting: 
- Once the seedlings have grown a few inches tall, thin them out to ensure proper spacing. Leave the strongest seedlings and remove the weaker ones.
- If transplanting is desired, carefully lift the seedlings and replant them in larger containers or directly into the garden.

9. Harvesting: 
- Black onions are typically ready for harvest 80-100 days after planting, depending on the variety. Harvest them when the tops have fallen over and started to dry.

10. Ongoing Care: 
- Continue to water the plants regularly, especially during dry periods.
- Monitor for signs of pests or diseases and take appropriate measures to address them.

### Tips:
- Mulching around the plants can help retain moisture and suppress weed growth.
- Enjoy the unique flavor and color of your homegrown black onions in various culinary dishes!

By following these steps and using the provided materials, you can successfully grow black onions from seeds in a plastic pot. Happy gardening!