Parsley is a cold-tolerant vegetable that thrives in cool and moist conditions. However, when cultivating it during the hot summer months, it's crucial to produce strong and healthy seedlings. After years of trial and error, I've developed the following effective methods for growing parsley seedlings, which I hope will be helpful to others.
**Variety Selection**
Choose heat-resistant and disease-resistant celery varieties that can withstand high temperatures. Based on my experience, Celery 3, Emperor West Celery, and New Generation Celery have shown excellent adaptability and resilience to both heat and diseases, making them ideal choices for summer planting.
**Timely Sowing**
The best time to sow celery seeds in our region is from early June to late June. It’s important to follow this schedule to ensure optimal growth conditions.
**Seed Germination Conditions**
Celery prefers cooler temperatures for germination, ideally between 15°C and 20°C. If the temperature exceeds 25°C, germination becomes difficult, and above 30°C, it may not occur at all. Therefore, during the summer, direct sowing should be avoided, and careful temperature control is necessary. To improve germination success:
- Soak the seeds in cold water for about 24 hours.
- Rinse and drain them, then let them dry for 10–20 minutes.
- Wrap the seeds in a clean, damp cloth (not too tight) and place them in a cool area (15–20°C). A refrigerator works well, or in rural areas, you can use a cellar or hang the seeds in a well with the seeds about 1 meter above the water level. Make sure to check the cloth every 1–2 days to allow air circulation. If the seeds start to dry, mist them lightly to maintain moisture.
Germination typically takes around 6 days, after which the seeds are ready for sowing.
**Sowing Techniques**
In summer, choose a seedbed that allows for easy irrigation and drainage. Apply sufficient base fertilizer and prepare the soil thoroughly. Once the water has been absorbed, mix the soaked seeds with fine soil and sprinkle them evenly into the bed. Cover the seeds with a thin layer of soil (about 0.5 cm thick). Keep the seedbed consistently moist throughout the germination period. The recommended sowing rate is 80 grams per acre, requiring a seedbed area of approximately 80 square meters.
**Seedling Management**
Protect the seedbed by creating an arch and covering it with shade nets or grass canopies. This helps keep the environment cool and moist. Raise the shade net or hay stack to about 40 cm to allow proper ventilation. From the time of sowing until the end of August, the seedlings should remain under shade. On cloudy or sunny days, you can remove the shade net in the morning and evening, and by late August, the shade can be fully removed.
During the transplanting phase, ensure the soil remains moist. In case of rain, cover the seedlings with a plastic sheet to protect them. Before the first true leaves appear, thin out the seedlings to promote root development. Water management should be moderate—water only when the soil starts to dry.
When the seedlings have 4–5 leaves, their growth accelerates, so more attention is needed. During the summer, water frequently to lower the ground temperature. Water every 2–3 days, preferably in the early morning or late evening.
**Weeding and Pest Control**
To prevent weed competition, apply herbicide two days after sowing. Use 120–150 grams of herbicide per acre, mixed with 75 kg of water, and spray it evenly over the seedbed. This helps maintain a clean and healthy growing environment for the young plants.
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