1. Use an LED grow light with enhanced blue spectrum, which improves vegetative growth, perfect for crops like herbs, leafy greens and micro greens.
2. Use an automatic watering system to ensure consistent moisture, and fertilize your planting on a weekly basis.
3. Use a strong-growing and bolt-resistant variety, which will provide multiple cuttings for months on end. The variety I use is Green Pearl Organic, available from William Dam Seeds.
4. Use a full-size tray, and plant thick. Parsley tolerates a high density of plants, and a thick seeding on a large tray will provide high yields.