Best Planting Times for Broccoli in Hawaii

Planting MethodActivityRecommended Dates
Outdoor PlantingIndoor Seed StartingAugust 1 – October 1
Transplant OutdoorsSeptember 15 – November 15
Greenhouse PlantingYear-roundAdjust planting based on temperature control in the greenhouse

Planting Conditions

Broccoli Planting Conditions

Hawaii’s tropical climate provides a unique environment for growing broccoli, with mild temperatures and abundant rainfall throughout the year. However, humidity and pests can pose challenges that gardeners need to consider for optimal cultivation.

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Useful Tools for Starting Broccoli Indoors

Using the right tools can save you time and increase your success rate.

Seeds

Quality seeds lead to better germination and healthier plants. Starting with high-quality seeds gives your broccoli the best chance to thrive from the very beginning.


Browse Broccoli Seeds on Amazon

Planting Trays

Planting trays help you organize your seedlings and ensure they have enough space to grow before you transplant them outdoors. This makes the process more efficient and increases the chances of strong, healthy plants.
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Grow Lights

Grow lights are essential if you don’t have enough natural sunlight. They provide your seedlings with the light they need to grow strong and healthy, even in less-than-ideal conditions.
Grow Lights Image
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Seed Starting Soil

Using light, fine soil specifically designed for seed starting helps young roots establish quickly and promotes healthy growth. It’s an easy way to give your seedlings the best start possible.
Seed Starting Soil Image
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Greenhouse Growing

In Hawaii, a greenhouse can provide a controlled environment for growing broccoli, protecting plants from excessive humidity, pests, and harsh tropical weather. This setup can extend your growing season, thus allowing for a more productive yield.

Consider investing in a 10×12 FT Greenhouse priced at $1,199 to ensure your broccoli thrives in a controlled environment.
Greenhouse Image 1
Greenhouse Image 2
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Fertilizer

For optimal broccoli growth in Hawaii, supplementing with fertilizer can ensure abundant and healthy harvests. Quality fertilizer helps replenish nutrients in the soil and promotes vigorous plant growth.
Fertilizer Image
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Other planting guides for Hawaii:

Optimal Planting Times for Broccoli in Hawaii

Pumpkin Planting in Hawaii

Tomato Planting in Hawaii

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

When to Plant Broccoli in Hawaii

In Hawaii, broccoli can be planted year-round due to its warm climate. However, for the best results, it is recommended to plant transplants outdoors during the cooler months from September to February. This will help in avoiding the heat stress that can occur during the summer months.

Transplanting Broccoli Seedlings

Transplant broccoli seedlings outdoors 2 to 3 weeks before the last expected frost. Space the seedlings 18-24 inches apart in rows with at least 36 inches between rows to ensure proper air circulation and growth.

General Care and Maintenance

Watering

  • Provide consistent and deep watering, aiming for at least 1 inch of water per week, especially during dry periods. Hawaii’s tropical conditions can lead to rapid soil moisture loss.
  • Water at the base of plants to avoid leaf wetness, which helps prevent fungal diseases common in humid environments.

Fertilizing

  • Apply a balanced fertilizer rich in nitrogen at planting time and when the plants are actively growing to support robust leaf development.

Pest and Disease Management

  • Regularly monitor for pests like aphids, cabbage loopers, and whiteflies, which can thrive in Hawaii’s climate. Early detection is key to managing infestations.
  • Consider using organic pest control methods and crop rotation to maintain healthy broccoli plants and reduce the risk of disease.

Harvesting

  • Harvest broccoli when the flower heads are firm and tight, typically 70 to 100 days after planting. Cut the head off with a sharp knife, leaving a few inches of the stem attached.

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.

The satisfaction when you harvest your own produce is well worth the time you put in 🙂

BeeJay
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