News and Events


«January 2025»
MonTueWedThuFriSatSun
303112345
6789101112
13141516171819
20212223242526
272829303112
3456789

Building an Ag Workforce

Building an Ag Workforce 6 July 2023

Building an Ag Workforce

UGC partners with Waipahu H.S. on workforce development

In line with CTAHR’s grand challenge to advance workforce and economic development, Extensionʻs Urban Garden Center is proud to partner with Waipahu High School and its ʻOhana of Excellence Academy (OEA), a pilot program funded by the Department of Labor and Industrial Relations (DLIR). 

Language-Appropriate Outreach

Language-Appropriate Outreach 6 July 2023

Language-Appropriate Outreach

Extension will use USDA grant to help immigrant farmers

Immigrant farmers in Hawaiʻi whose native tongues include Thai, Lao, Ilocano, Chinese and other languages often find it difficult to access new safety guidelines and other important agricultural information.

Fast Forward

Fast Forward 12 May 2023

Fast Forward

Youths aren’t forgotten in Urban Garden Center’s many interactions with the public

As more than 250 students from 24 high schools across the state gathered to participate in this year’s Future Farmers of America convention on Oʻahu, the Urban Garden Center proved a key resource in the event. The youths visited UGC and took part in fast-paced educational activities around the facility. With their teachers, the students got their hands dirty restarting a static hydroponic system, harvesting locally grown fruits and veggies in raised beds, and transplanting succulents.

What’s All the Buzz About?

What’s All the Buzz About? 12 May 2023

What’s All the Buzz About?

Maui 4-H bee house reopens after pandemic

The Bee House at the CTAHR Maui Extension Office is making a triumphant return after a three-year-long hiatus due to the Covid-19 pandemic. Led by 4-H Youth Development Agent Nancy Ooki and Master Gardener Coordinator and Beekeeper Eric Demaria, the project seeks to teach youths about the importance of bees to Hawaiʻi’s ecosystems. 

The Potential for Sweet Onions

The Potential for Sweet Onions 21 April 2023

The Potential for Sweet Onions

Extension’s field day draws a large, interested crowd

The length of the day plays a large role in the development of sweet onion bulbs, thus farmers in Hawaiʻi have historically been limited to growing only “short-day” onions, especially during the winter when days are shorter. However, there are options for growing intermediate-day varieties in the summer months, and this potential opportunity drew more than 30 growers and community members to Extension’s recent field day at Poamoho Experiment Station.

CTAHR & City Mill

CTAHR & City Mill 21 April 2023

CTAHR & City Mill

Extension’s garden education is a hit with the community

“Basic Planting Guidelines” was anything but academic for the packed house of community members at City Mill’s recent garden education program. Led by Extension’s Tina Lau and the Master Gardeners, it encouraged home gardeners to be plant detectives, able to observe and diagnose their plant problems and to introduce the Oahu Master Gardener Helpline as a resource online, via the telephone, or in-person. It was the latest example of CTAHR and City Mill working together to promote more food production in the state, as well as raise awareness and heighten the availability of garden products locally. 

Honorary Outstanding Alumnus

Honorary Outstanding Alumnus 29 March 2023

Honorary Outstanding Alumnus

The Dean’s Award goes to Fred Lau

After graduating from Kalani High School in 1972 and matriculating to CTAHR, Fred Lau couldn’t wait to start his own business. So in his last year of college, he and a friend left UH to start their own business. Their plan was to look through the Yellow Pages for a nursery-related business with the least amount of competition. The plant rental section had only two businesses listed, so the partners walked into hotels and businesses in Waikiki offering these services to any manager who would meet with them. 

Gone to the Birds

Gone to the Birds 29 March 2023

Gone to the Birds

Extension on the Ground focuses on rose-ringed parakeets

Commercial and backyard gardeners alike will tell you the same thing: fruit is on the tree one day, and gone the next. The culprit? In addition to the local bulbul, doves, cardinals, and myna birds, the rose-ringed parakeet is now a known culprit. These beautiful but voracious invasive pests have been on Oʻahu since the 1930’s, but are quickly growing in population numbers. 

Excellence in Extension

Excellence in Extension 17 March 2023

Excellence in Extension

The Dean’s Award goes to the Banana Bunchy Top Virus Team

The Dean’s Award for Excellence in Extension distinguishes an exceptional Extension faculty member or team whose work has demonstrated outstanding performance and significant results. This year, the award goes to the team who have worked to revitalize the Hawaiʻi banana industry with clean, virus-free planting materials in a statewide Extension outreach program.

Outstanding Volunteer

Outstanding Volunteer 17 March 2023

Outstanding Volunteer

The Dean’s Award goes to Beatrice Sailer

Volunteers are the lifeblood for Extension programs such as 4-H and Master Gardener. The recipient of the Dean’s Award for Outstanding Extension Volunteer goes to Beatrice Sailer, Master Gardener volunteer.

CTAHR Represents

CTAHR Represents 17 March 2023

CTAHR Represents

Grow Hawaiian Festival at Greenwell Ethnobotanical Garden makes a return

On the misty morning of Saturday, February 25th, hundreds of people gathered at the Amy B.H Greenwell Ethnobotanical Garden to celebrate Hawaiian culture and natural history at the 2023 Grow Hawaiian Festival. Hosted by the Friends of Amy B.H Greenwell Ethnobotanical Garden, the festival was the garden’s first event in over 3 years.

On the Air

On the Air 28 February 2023

On the Air

Extension’s Amjad Ahmad is interviewed on Hawai'i Public Radio

Rotting and leafless avocado trees are spreading nationwide due to lace bugs. With the trees in jeopardy, Extension agents in the Dept. Of Tropical Plant and Soil Sciences are doing extensive research to determine the most effective courses of action to get rid of these pests. Their research thus far has determined some strategies that could help avocado tree owners decrease their chances of attaining lace bugs and even exterminating them.

Taking on Atlanta

Taking on Atlanta 28 February 2023

Taking on Atlanta

12 Maui 4-H youths attended the national 4-H congress

For many 4-H youths, the National 4-H Congress is a highly anticipated annual event that celebrates the culmination of a year’s worth of personal growth, hard work, and service-learning. Hundreds of 4-H delegates gather every year in Atlanta, Georgia to network with other 4-H peers from around the nation, participate in community service events, and attend workshops about leadership, volunteering, global awareness, and inclusion.

Irrigation Systems

Irrigation Systems 28 February 2023

Irrigation Systems

Extension hosts a workshop for the community

With seasonal rains coming down seemingly nonstop, the topic of irrigation was front and center as Oʻahu County Extension hosted a workshop for backyard and Master Gardeners. Guests welcomed the opportunity to get out of the rains to attend the educational workshop as Extension agents explained measures that CTAHR has taken to reduce potable water use at the Urban Garden Center, and the role of Cooperative Extension in fulfilling CTAHR’s land grant college mission.

Horsin’ Around

Horsin’ Around 10 February 2023

Horsin’ Around

Oʻahu County 4-H shines at National Western Stock Show

Every year, nearly 700,000 ranchers, farmers, and rodeo enthusiasts from around the country make the pilgrimage to Denver to watch and participate in the world’s largest stock show and celebration of Old Western culture and heritage. The National Western Stock Show is a 16-day-long fair featuring rodeo shows, hundreds of food and livestock vendors, barbeque competitions, fiddling contests –  and everything in between.

One Health Hawai‘i

One Health Hawai‘i 30 January 2023

One Health Hawai‘i

CTAHR supports Gov. Green’s proclamation

Did you know that 75% of new human pathogens over the past three decades have originated from animals? What’s more, many common causes of human infection, such as E. coli and Salmonella, are shared with animals and readily found within the environment.

Happy Plantsgiving

Happy Plantsgiving 9 December 2022

Happy Plantsgiving

Community garden event pairs FCS with FETCH

Bringing families together is a concept that dates back to the very first Thanksgiving. This past Nov. 23, an inaugural community garden event, “Plantsgiving Thanksgiving,” was co-hosted by the Dept. of Family and Consumer Affairs and CTAHR’s Family Education Centers of Hawaii, Inc.

Global Interest

Global Interest 18 November 2022

Global Interest

HNFAS Extension is recognized by NIFA

Congrats to Mark Thorne on a Partnership Award for Multistate Efforts! His National Connections Teams for Forest & Rangeland Resources team was recognized by the USDA’s National Institute of Food and Agriculture for developing the web-based conference series, “Strengthening RREA programing Through Enhanced Connections.”

Life Skills

Life Skills 18 November 2022

Life Skills

4-H creates a youth entrepreneurship pilot program

Imagine a club where youths meet weekly, participate in hands-on activities that spark creativity and innovation, and learn business components such as customer service and marketing. Throw in a food safety course from the state Dept. of Health and ways to incorporate Hawaiian values, agriculture, and local value-added product innovations into their business strategy. Top it off with a capstone project, a Keiki Open Market, where the youths showcase their vegetables, value-added products, and other inventions.

Zero Dark Twolined

Zero Dark Twolined 3 November 2022

Zero Dark Twolined

Extension develops an app to manage the Twolined Spittlebug

By the time it was discovered in Hawaiʻi in 2016, this invasive pest had already damaged 2,000 acres of rangeland. A scant eight generations later, the Twolined Spittlebug (TLSB) had expanded its range to more than 176,000 acres. In highly infested areas where nymph density exceeded 50/m2, the result was nearly 100% die back of key range forages, including Kikuyu and pangola grasses – and their loss exposed the land to invasive plants like Pamakani, wild blackberry, and fireweed. Livestock producers faced devastating economic losses.

RSS
135678910Last
13 April 2020

Potting Mix, Fertilizer, and Irrigation

The right combo will boost your container garden

Potting Mix, Fertilizer, and Irrigation

Vegetables grow year-round in Hawai‘i, but sunshine and good weather aren’t enough to guarantee success. What happens under the ground, where the roots are developing, is critical to the success of your garden. In this article, we’ll cover how to “feed your food” with the right growing mediums, nutrients, and hydration.

Potting Mix

Commercial potting mixes generally do not contain soil, but rather different materials that promote drainage, aeration, moisture, plant support, and nutrient absorption. They’re ideal for containerized gardens. You can readily find potting mixes at garden nurseries, supermarkets, home improvement stores, or online.

You can also supplement the store-bought mixes with extras from home. For example, topsoil from your garden can be added in a 1:1 ratio—but be careful if soil-borne plant diseases are a problem in your area. You could also add compost, up to 50% of the total mixture. Coir (shredded coconut husk fiber) is another alternative material that can be used in place of, or in combination with, potting mixes.

Fertilizer

One of the most important aspects of successful gardening in Hawai‘i is proper fertilization. A common misconception is that store-bought potting mixes and local garden soils have adequate nutrition to carry all crops to harvest. Unfortunately, mixes often do not come with fertilizer included, and even if they do, they probably don’t have sufficient nutrients to carry the vegetable through its life cycle.

A good general-use fertilizer for containerized plants is Osmocote, which can be incorporated at planting, at a rate of 1 teaspoon to 1 tablespoon per gallon of media. This fertilizer releases nutrients slowly over a long period of time.

General-use granular and dry fertilizers are good options for Hawaiʻi, too. They tend to be fast-acting and are best applied by incorporating directly into the soil. You can also re-apply the fertilizer to the top of the soil line every 2–3 weeks. Foliar fertilizers are water-soluble and can be applied to the soil or sprayed onto the plant’s foliage.

Many organic fertilizers are available to local gardeners. They provide nutrients and contribute to soil health. Organic fertilizers are typically plant or animal based and release nutrients slowly over time as they decompose. The more you garden, the more you’ll learn how to adjust the amount of nutrients for the crops being grown, in order to achieve optimal productivity.

Watering

Daily watering is sufficient for container vegetable gardens. Irrigating in the morning will provide water for plants during the day when they need it, while minimizing excess moisture at night that can contribute to disease. During hot weather and longer days, irrigation may need to be applied more than once per day in order to keep up with plant water demand or minimize heat stress. But avoid overwatering to minimize root-rot diseases. A simple hose-end timer connected to flexible plastic tubing with drip or spray emitters is easy to install from parts found at local garden shops, and can provide water when you are away at work.

At least once a week, give the plants an extra-thorough watering to flush out any excess salts that may have built up because of the fertilizer. Keep in mind that drainage will carry away nutrients that can pollute streams and the ocean, so try to direct drainage to landscape plants and soil, rather than into the storm drain.

For specific questions about pest management, visit the UH Master Gardeners website.

Jari Sugano and Kalani Matsumura, Cooperative Extension Service and Master Gardener Program, UH College of Tropical Agriculture and Human Resources