When to Plant Cilantro in Delaware (2026 Guide)
Growing cilantro in Delaware can be a rewarding venture for any herb enthusiast. To achieve the best results, understanding your specific location's climate is key. For those in Zone 6b, the last expected spring frost typically occurs around April 10, which influences your planting schedule accordingly. It’s important to plan around this date to ensure a robust harvest of this flavorful herb.
On the other hand, gardeners in Zone 6a should pay particular attention to their frost dates as well. The median last frost arrives a bit later, around April 18, which means timing needs to be adjusted slightly. Knowing these frost dates allows you to effectively map out when to sow your cilantro seeds directly into the ground for optimal growth.
Cilantro thrives in cooler temperatures and is quick to bolt during the heat of summer. Thus, understanding when to plant is crucial for a continuous harvest. By following the right timelines in Delaware's varying climates, you can enjoy fresh cilantro from early spring until late fall, making it a delightful addition to your culinary creations.
Planting Schedule by USDA Zone in Delaware
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Not recommended — direct sow only | Not recommended — direct sow only | Start March 15 – May 1, ~6–8 weeks after April 10 | Harvest from late May – October 30, ~6 weeks after sowing |
| Zone 6a | Not recommended — direct sow only | Not recommended — direct sow only | Start March 30 – May 1, ~6–8 weeks after April 18 | Harvest from late May – October 24, ~6 weeks after sowing |
Cilantro Planting Windows in Delaware
- Indoor start: Not applicable, as cilantro should never be started indoors; it is best sown directly in the garden.
- Transplant outdoors: Not applicable, as cilantro should never be transplanted outdoors; direct sowing is the only recommended method.
- Harvest: You can begin harvesting cilantro as early as late May and continue through October 30 for Zone 6b, or until October 24 in Zone 6a.
Common Mistakes Growing Cilantro in Delaware
- Many Delaware gardeners underestimate the impact of late frosts, especially in early April. It's crucial to wait until the last frost date before sowing cilantro to prevent damage to the young plants. Attempting to plant cilantro too early can result in seed loss and wasted effort.
- Delaware's coastal climate can be humid, which might lead some gardeners to overwater their cilantro. This plant thrives in well-drained soil, and excessive moisture can promote root rot. Ensuring good drainage is vital for healthy growth.
- A common mistake is planting standard cilantro varieties that bolt quickly in Delaware's warming temperatures. Consider using slow-bolting types like 'Santo' or 'Leisure' to prolong the leaf harvest before the plants flower and set seed.
- Gardeners sometimes confuse cilantro and coriander, leading to accidental cross-pollination when planted too close together. In Delaware, maintain a distance of 3–4 feet between these herbs to avoid muddled flavors and keep your crops true.
- Failing to recognize that Delaware's growing season can sometimes be unpredictable—especially with late spring snows—can leave your crops vulnerable. Planning for potentially cooler conditions at the start can enhance your cilantro's chances of success.
Frequently Asked Questions
What should I do if I'm in a cold pocket of Delaware?
If you're in a colder part of Delaware, wait until at least the last frost date to sow cilantro. Using row covers can help protect your plants if temperatures drop unexpectedly. Additionally, keep track of local weather conditions for any late frosts.
Can I still plant cilantro in May?
Yes, you can plant cilantro in May, especially if you're in Zone 6b. Just be aware of the risk of bolting as temperatures rise. It’s best to direct sow until at least early May to take advantage of the cooler beginnings of the season.
How do I know when to harvest my cilantro?
Cilantro can be harvested once it reaches about 4-5 inches tall, typically around late May. The leaves should be vibrant and usable until the first fall frost, so check for flavor and size regularly to ensure the best quality.
Why does my cilantro keep bolting?
Cilantro bolts when temperatures rise, typically in spring and early summer. If your plants are rushing to flower and seed early, consider staggering your sowing every few weeks to obtain a continuous harvest of vibrant leaves.
Can I use old cilantro seeds for planting?
Using old seeds can yield low germination rates. It's best to use fresh, high-quality seeds as cilantro doesn't store well long-term. Check seed packets for expiration dates before planting to ensure viability.
Keep Learning
City guides in Delaware
Other crops in Delaware
Typical fall sowing window for Cilantro in Delaware: August 7 – August 28.