Arugula, commonly known as rocket, is a nutritious leafy green that is rich in vitamins A, C, and K, along with calcium and iron. This peppery green is a favorite ingredient in salads, sandwiches, and pasta dishes.
Best Planting Times
| Planting Method | Activity | Recommended Dates |
|---|---|---|
| Outdoor Planting | Direct Sowing | April 15 – June 1 |
| Succession Planting | Every 2-4 weeks during spring and fall | |
| Greenhouse Planting | Year-round | Adjust planting based on temperature control in the greenhouse |
Planting Conditions
The cooler climate is perfect for growing arugula, as it thrives in moderate temperatures. Understanding when to plant is vital for ensuring success, especially in the areas that experience colder conditions.
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Useful Tools for Starting Arugula Indoors
Utilizing the right tools will enhance your chances of success when starting arugula indoors.
Seeds
Starting with quality seeds results in better germination and healthier plants. Choose high-quality seeds to give your arugula the best start. For perennial options, consider wild rocket types, which are spicier and will return each year. The Astro variety is recommended as it is a vigorous, all-season option with long leaves and a nutty flavor.
You can find Astro Arugula Seeds on Amazon here: https://amzn.to/4gTTIgT
Planting Trays
Utilizing planting trays allows for better organization of seedlings and ensures they have adequate space to grow before being transplanted outdoors. This can increase the success of establishing strong plants.
Find Planting Trays on Amazon
Grow Lights
Grow lights are essential for providing sufficient light to seedlings, particularly in less than ideal lighting conditions.
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Seed Starting Soil
Using a light, fine soil designed specifically for seed starting helps young roots establish quickly, promoting healthy growth. This simple step significantly benefits seedling health.
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Average First Frost Dates for Maine’s Major Cities
In Maine, it is advisable to plant arugula outdoors approximately 2-4 weeks before the expected first frost date in late autumn to maximize growth and flavor.
| City | Average First Frost Date |
|---|---|
| Portland | October 15 |
| Bangor | October 5 |
| Augusta | October 1 |
| Caribou | September 28 |
Disclaimer: Frost dates are average estimates, and actual conditions may vary. It is recommended to monitor local forecasts and adjust planting decisions as necessary.
Greenhouse Growing
In colder climates, a greenhouse is an excellent way to extend the growing season for arugula. It provides a controlled environment that protects plants from frost and harsh weather, allowing for year-round cultivation. Additionally, it helps maintain stable temperatures, which are particularly beneficial during the chilly months.
This 10×12 FT Greenhouse from HOWE is available on Amazon for $999.00 right now.
Check the latest price on Amazon.
Fertilizer
Using a good fertilizer is important for maintaining healthy growth in arugula. It replenishes nutrients within the soil and encourages robust development.
Check out Fertilizer on Amazon
Other planting guides for Maine:
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General Care and Maintenance
Watering
- Water arugula consistently to keep the soil evenly moist, particularly crucial in dry spells.
- Water at the base of the plants to lessen leaf wetness, thereby reducing the risk of fungal diseases.
Fertilizing
- Apply an all-purpose fertilizer at planting and again once the first true leaves come up. Incorporating compost can significantly improve soil quality.
Pest and Disease Management
- Keep an eye out for common pests, including aphids and flea beetles. Being vigilant is essential for maintaining plant health.
- Utilize organic or integrated pest management techniques to safeguard your arugula plants from pests and diseases.
Harvesting
- Harvest leaves once they reach a size of 3-6 inches. Frequent harvesting encourages further growth and extends the harvest season.
In my own garden, I usually plant arugula in both spring and fall to maximize yields. It prefers cooler temperatures for optimal growth. If starting from seeds isn’t feasible, young plants are typically available at local nurseries.
If you’re uncertain about harvesting your arugula, aim for mature leaves that are at least 2-3 inches long. Regularly picking leaves will promote new growth and stretch out your harvest.
Additionally, check for pests like aphids and manage them swiftly. With careful attention and proper care, growing arugula can provide a rewarding addition to your meals.
Starting Arugula Indoors
In Maine (Zone 5a-5b), begin indoor arugula seed starting between March 15 and April 15. This timeline ensures healthy seedlings ready for outdoor transplantation starting from mid-April to early May, once the risk of frost has passed.
Transplanting Arugula Seedlings
Transplant arugula seedlings outdoors from April 20 to May 5, ensuring the soil has warmed above 45°F consistently. Space the seedlings 6-12 inches apart in rows with at least 12 inches between rows for optimal growth.
General Care and Maintenance
Watering
- Provide consistent and deep watering to maintain evenly moist soil. Maine’s climate may require frequent watering during dry spells to prevent soil dryness.
- Water at the base of plants to avoid leaf wetness, which can lead to fungal diseases.
Fertilizing
- Apply a balanced fertilizer during planting and again a few weeks after transplanting to encourage lush foliage growth. Incorporating compost before planting can improve soil fertility and structure.
Pest and Disease Management
- Regularly monitor for common pests like aphids and flea beetles. The cooler climate in Maine can help reduce some pest pressures, but vigilance is still essential.
- Implement organic or integrated pest management methods to protect arugula plants from pests and diseases.
Harvesting
- Harvest arugula leaves when they reach the desired size, usually when they are 4-6 inches long. Regular harvesting encourages new growth and prevents the plants from bolting.
The importance of good soil
Before starting to grow it is important to take a step back and find the condition of the soil in your garden,The optimal soil is a blend that includes the mineral-rich dirt along with organicrich organic matter that plants need to thrive.
In my garden I try to compost as mutch as possible, so I can mix in the nutrient ritch compost in my soil. I use both hot composting of food scraps and cold composting of all organic garden “waste”..
If you dont have the time or space for composting, it is possible to get compost ready to use in garden centers and Community Composting.
You can read more on Community Composting here: https://www.epa.gov/sustainable-management-food/community-composting
If you are uncertain of the quality of your soil, you can get easy to use soil tests at amazon for 17 dollars. Check latest prices here: Soil testing kit.
Also remember to check out how much sunlight your growing area gets, and that the rain drains well. If you treat your soil well and plan you crops according to your climate you will succeed with any plant you want.
What are the optimal planting dates for arugula?
The best time to plant arugula is in early spring, typically from late April to early June, and again in late summer for a fall harvest.
Can I plant arugula in the fall?
Yes, late summer planting is possible, from August to September, allowing for a fall harvest before the first frost.
How does frost affect arugula planting?
Arugula can tolerate light frost, but it’s important to plant it early enough in spring or late summer so the main growing period occurs when temperatures are above freezing.
Is it necessary to start arugula seeds indoors?
While it’s not necessary, starting seeds indoors can provide a head start on the growing season if outdoor conditions are still too cold or wet.
What if I miss the early spring planting period?
If you miss the early spring window, you can still plant arugula in late summer for a fall harvest, as long as it’s before the first heavy frost.
I'm passionate about cultivating greens in all forms: from kitchen garden to fruit and berry trees. I am also enthusiastic
about creating high-quality soil by utilizing household compost. View Author page
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