When it comes to planting celosia, timing is key. Celosia is a warm-season annual plant that thrives in full sun and well-draining soil. To ensure the best success with your celosia plants, it’s important to know the ideal time to plant them.
In most regions, celosia can be started indoors 6-8 weeks before the average last spring frost date. This allows the plants to grow and develop a strong root system before being transplanted outside. Starting them indoors also provides a controlled environment where you can provide the necessary warmth for germination and early growth.
To start celosia seeds indoors, fill seed trays or small pots with a seed-starting mix. Moisten the mix and then sprinkle the seeds on the surface, gently pressing them into the soil. Since celosia seeds are very small, it’s best to avoid covering them with soil, as they need light for germination. Place the trays or pots in a warm location, around 70-75°F (21-24°C), and keep the soil consistently moist.
As the seeds germinate and seedlings begin to grow, it’s important to provide adequate light. A sunny windowsill or using grow lights can help ensure the seedlings receive the light they need. If using artificial lights, keep them about 6-12 inches (15-30 cm) above the seedlings and adjust the height as they grow.
Once all danger of frost has passed, typically after the last spring frost date, you can transplant your celosia seedlings outdoors. Before planting, harden off the seedlings by gradually exposing them to outdoor conditions over the course of a week. Start by placing them outside for a few hours each day, gradually increasing the time and intensity of exposure.
Choose a location in your garden that receives full sun for at least 6-8 hours a day. Prepare the soil by loosening it with a garden fork or tiller and incorporating compost or organic matter to improve its fertility and drainage. Dig holes that are slightly larger than the root ball of each seedling and plant them at the same depth they were growing in their containers.
Space the celosia plants according to the specific variety you’re growing, as they can vary in size. Generally, allow about 8-12 inches (20-30 cm) between plants to give them enough room to grow and spread.
If you prefer to skip the indoor seed starting process, celosia can also be directly sowed into the garden after the threat of frost has passed. Wait until the soil has warmed up to at least 60°F (16°C) before sowing the seeds directly into the ground. Place the seeds about 1/8 inch (3 mm) deep and 1-2 inches (2.5-5 cm) apart. Keep the soil consistently moist until the seeds germinate, which typically takes about 7-14 days.
Celosia can be planted indoors 6-8 weeks before the average last spring frost date or directly sowed into the garden after the threat of frost has passed. By following these recommended planting times, you can ensure healthy and vibrant celosia plants that will provide beautiful blooms throughout the summer months.
