Use this planting calendar to find the best times of the year to grow fruits, vegetables, herbs, flowers, and other popular plants in Kahului, HI, based on the USDA Hardiness Zone 12a.
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Kahului, HI Frost Dates & Growing Season
Last Spring Frost Date for Kahului, HI
The average last frost date in spring for Kahului is January 1st. For gardeners planting sensitive crops like tomatoes, peppers, and basil, it is generally recommended to wait until January 15th before moving plants outdoors. Waiting these extra few weeks significantly reduces the risk of a late freeze damaging young transplants.
First Fall Frost Date for Kahului, HI
The average first frost date in fall for Kahului is December 31st. This date marks the approximate end of the growing season for tender plants. Gardeners should plan to harvest frost-sensitive vegetables or provide heavy protection (such as row covers) before this date to avoid crop loss.
Growing Season Length in Kahului, HI
Based on historical frost data, the estimated growing season length in Kahului is approximately 364 days. This duration determines which vegetable varieties have enough time to reach maturity before the winter cold sets in. Short-season varieties are recommended for crops that require a longer warm period.
Please note: These dates are climatological averages. Actual weather conditions vary by year. Always check the local 10-day forecast before planting.
Kahului, HI Planting Calendar
This weekly planting calendar displays the ideal windows for starting seeds, transplanting, and harvesting your plants.
Kahului, HI Monthly Planting Recommendations
January
In January, recommended activities include direct sowing Cosmos (from January 8th to January 15th), direct sowing Corn (from January 15th to January 22nd), and direct sowing Lemon Balm (from January 1st to January 15th).
October
In October, recommended activities include starting Geranium seeds indoors (from October 23rd to November 6th), starting Celery seeds indoors (from October 23rd to November 6th), and starting Lavender seeds indoors (from October 23rd to November 6th).
November
In November, recommended activities include starting Marigold seeds indoors (from November 20th to December 4th), starting Cauliflower seeds indoors (from November 6th to November 20th), and starting Pepper seeds indoors (from November 6th to November 20th).
December
In December, recommended activities include direct sowing California Poppy (from December 4th to December 18th), direct sowing Alfalfa (from December 4th to December 18th), and direct sowing Radish (from December 4th to December 18th).