How to grow carrots: most gardeners grow carrots from seed directly sown outside in the ground or in pots. Carrots are not usually transplanted though they can definitely be transplanted.
Sow carrots seeds 0.8 inches (2.1 cm) deep. Optimal soil temperature for germination is between 61.4°F (16.3°C) and 73.79°F (23.1°C). Seeds will germinate in about 9-18 days.
Carrots requires 60-70 days to be ready for harvest from seed, depending on the carrot variety selected and the weather during the growing season. Do no wait until carrot plant fully matures, bearing flowers, to pluck carrots out of the ground. They are usually harvested as mature plants.
Optimal day air temperature for growing carrots is between 60.3°F (15.7°C) and 65.3°F (18.5°C). Optimal night temperatures are between 50.7°F (10.4°C) and 52.6°F (11.5°C). Carrots can endure air temperatures as low as 45.5°F (4°C) during the night and up to 86°F (30°C) during the day – but best to stay in optimal range.
Soil temperature during carrot growth should be between 60°F (15.6°C) and 69.8°F (21°C) in optimal conditions, but can withstand soil temperatures as low as 50°F (10°C).
Required soil pH for Carrots growth is 5.8-7.5 but the optimal pH is 5.9-6.9.
Optimal sunlight for Carrots is 6-12 hours per day. Carrots should be watered between 1.0-1.1 inches (2.5-2.9 cm) of water per week, adjusting for weather conditions and type of soil accordingly.
Carrot spacing: When planting carrots seeds directly into the ground sow seeds 0.8 inches (2.1 cm) deep spaced 1.9 inches (4.8 cm) apart with rows spaced 15.8 inches (40.2 cm) apart.
How to grow carrots in your garden: carrots seeds are very small, so many gardeners do not plant carrots seeds one by one but rather spread them in a row. However, once the carrots seeds begin to grow they need to be thinned so that they don’t grow one on top of the other.
Thinning is the process of removing a plant or a seedling to make room for another plant or seedling. Thinning provides more room for each plant to grow and not fight over the same available resources (moisture, nutrients, light, etc’). Thinning allows for better air circulation between the plants, providing plants with better growing conditions
Thinning can be avoided if you take the time and plant each seed one by one with the recommended seed and row spacing.
How to thin carrots: before thinning make sure that the soil is moist so it’s easier to pull the seedlings out. Carrots are usually thinned when carrots tops are around 4 inches (10 cm) tall though you can begin thinning when carrots tops are 2 inches (5 cm) tall.
Pull carrot tops very gently making sure that you do not pull other carrot tops out of the ground. Continue to do so until there is 1.9-2.0 inches (4.8-5.0 cm) space between each carrot.
Don’t throw the carrots you just pulled out of the ground! Transplant them. Select another spot, and make a hole using the full length of a pencil. Make sure you are spacing the carrot transplants 1.9-2.0 inches (4.8-5.0 cm) apart. Gently hold the carrot and replant in the hole you just made. Gently press the soil around the transplant and water lightly. We want to make this an easy transition with little shock to carrots.