Bowl of Arugula

Arugula, also known as rocket, is a leafy green packed with essential nutrients including vitamins A, C, and K, as well as calcium and iron. This peppery green is a favorite in many kitchens, ideal for salads, sandwiches, and various pasta dishes.

Best Planting Times

Planting MethodActivityRecommended Dates
Outdoor PlantingDirect SowingApril 1 – May 15
Succession PlantingEvery 2-3 weeks from April to June and again in September to October
Greenhouse PlantingYear-roundAdjust planting based on temperature control in the greenhouse

Planting Conditions

Arugula Planting Conditions

The cooler climate offers a great environment for arugula, allowing it to thrive in the spring and fall seasons. Knowing the USDA Hardiness Zones (4 to 7) for this region is key to ensuring optimal growth.


Affiliate Disclosure: As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.

Useful Tools for Starting Arugula Indoors

Employing the right tools is essential for a successful planting experience.

Seeds

Using quality seeds ensures better germination and stronger plants. High-quality seeds give your arugula the best start.
For perennial options, look for wild rocket types, known for their spiciness and ability to return each year. The Astro variant is popular for its vigorous growth and exceptional flavor.

Astro Arugula Seeds

You can find Astro Arugula Seeds on Amazon here: https://amzn.to/4gTTIgT

Planting Trays

Seeds can be organized and nurtured in planting trays, maximizing their growth potential before transplanting outdoors, which increases the chances of thriving plants.
Planting Trays Image
Find Planting Trays on Amazon

Grow Lights

When natural sunlight is insufficient, grow lights can provide the necessary lighting for seedlings to flourish.
Grow Lights Image
Check out Grow Lights on Amazon

Seed Starting Soil

Using a light, fine seed starting soil promotes quick root establishment and ensures healthy growth from the start.
Seed Starting Soil Image
Get Seed Starting Soil on Amazon

Average First Frost Dates for Idaho’s Major Cities

Plan to sow arugula seeds outdoors roughly 2-4 weeks before the expected first frost in mid-autumn for optimal growth and flavor.

CityAverage First Frost Date
BoiseOctober 10
PocatelloOctober 1
Idaho FallsSeptember 25
Coeur d’AleneOctober 15
MeridianOctober 5

Disclaimer: Frost dates are average estimates, and actual conditions may vary. It’s wise to monitor local forecasts and adjust planting accordingly.

Greenhouse Growing

In colder climates, utilizing a greenhouse can effectively shield arugula from harsh temperatures. With climate control, you can extend the growing season and ensure consistent soil temperatures suitable for healthy growth. Greenhouses also protect against unpredictable weather changes.

This 10×12 FT Greenhouse from HOWE is available on Amazon for $999.00 right now.
Greenhouse Image 1
Greenhouse Image 2
Check the latest price on Amazon.

Fertilizer

Using fertilizer can significantly enhance arugula growth by replenishing the soil and promoting vigorous plant health. Regular fertilization helps maintain topsoil richness and boosts harvest yield.
Fertilizer Image
Check out Fertilizer on Amazon


Other planting guides for Idaho:

Broccoli Planting in Idaho

Kale Planting in Idaho

Pumpkin Planting in Idaho

Any questions on growing cucumbers? Visit our forum to discuss: Growing Cucumbers Forum.

General Care and Maintenance

Watering

  • Consistency in watering keeps soil moisture balanced, especially crucial in drier climates.
  • Water at the base of the plants to reduce leaf wetness, lowering the risk of fungal diseases.

Fertilizing

  • Apply balanced fertilizer during planting and again when the first true leaves show. Adding compost can enhance overall soil health.

Pest and Disease Management

  • Be vigilant for pests like aphids and flea beetles. Regular monitoring is crucial, especially in warmer temperatures.
  • Utilize organic methods or integrated pest management to protect your crops from pests and diseases.

Harvesting

  • Harvest leaves when they reach 3-6 inches long. Regular cuts promote new growth and can extend your harvest period.

In my experience, planting arugula in both the spring and fall yields the best results. The plants flourish in cool temperatures, making timing essential. If you’re pressed for time, young arugula plants can often be found at local nurseries.

BeeJay