CTAHR NEWS

Fast Green Food

Grow a salad bowl in your back yard

Fast Green Food

You may be eating less salad these days. Everyone’s making fewer trips to the supermarket, and lettuce and other tender greens are easily perishable. But growing your own lettuce is a great solution—now and going forward. Lettuce is fast growing and ideal for backyard gardens. You can pick individual leaves each day or harvest whole heads at once. By starting a new set of seeds or transplants every few weeks, you can create succession plantings to ensure a continuous salad bar!

Temperature and Varieties

Lettuce does best in cool climates or during cool seasons. At higher temperatures, lettuce can bolt (flower), become bitter, and form loose heads.

No problem! Just make sure you select the right lettuce. Varieties with tolerance to high temperatures can be grown in warmer areas year-round.

The variety commonly called ‘Mānoa’ lettuce, identified by CTAHR researchers as ideal for Hawai‘i conditions, has always been a local favorite. It has a buttery flavor and crisp texture—my family loves to eat it with a little mayonnaise and shoyu as dressing.

However, in recent years, ‘Mānoa’ lettuce has become extremely sensitive to heat. It may prematurely bolt and develop “tip burn” on the leaf edges. So CTAHR has identified ‘Ānuenue’ as a more heat-tolerant variety. Similar to ‘Mānoa’, it’s another local favorite that can be grown at low elevations. Both can be grown year round in Hawai‘i, and the seeds are available from the UH Seed Laboratory (which offers mail ordering).

There are plenty of other lettuce varieties you can try—just look for types that say they’re heat tolerant. Plant several for a rainbow of colors and tastes!

Nip Problems in the Bud

Besides heat, tip burn can be caused by not enough water, too much fertilizer, or not enough calcium in the soil—but these conditions are easy to fix. First, try watering your lettuce more, then ease up on the fertilizer. As a last resort, add a soil supplement containing calcium.

Thrips, birds, and spotted-wilt virus can also affect your backyard lettuce crop. Consult the UH Cooperative Extension service for the latest pest-control techniques.

Be sure to wash lettuce and other produce thoroughly before serving, to remove any tiny snails or slugs that might be on it.

Feed Your Heads

Lettuce grows best in soils rich in organic matter with a neutral pH. Add organic compost, properly composted chicken manure, and a sprinkle of triple superphosphate fertilizer (0-45-0) to the planting hole for a healthy start. If you can’t find superphosphate, a general-use fertilizer such as 16-16-16 is fine.

After planting, apply a dry general-use fertilizer every three to four weeks or fertilize every two weeks with a water-soluble fertilizer. Because lettuce is eaten raw, use clean, potable water for overhead irrigation and when fertilizing.

Happy salading!

Jari Sugano, O‘ahu County Administrator, College of Tropical Agriculture and Human Resources

Print

Giant Candy Canes

“Kō: Ethnobotanical Guide to Hawaiian Sugarcane Cultivars” gives a fascinating history

Ready, Set, Students

No in-class? No problem. ASAO is keeping CTAHR students in the loop

Helping 500,000+

The 2020 AUW Campaign targets Hawaiʻi residents who need assistance

A.I. in Ag

New grant opportunity is due October 5

Beyond Beginners

GoFarm Hawaiʻi consults on business plans, grant writing, and a whole lot more.

Vegan Leather

FDM students hope to establish sustainable manufacturing in Hawaiʻi

One Busy Man

Extension agent is helping livestock producers, near and far

$1.5M for Ag Ed

Grant designed to expand education for Native Hawaiians

Primed for Expansion

NIFA awards almost $1M to CTAHR’s Center for Tropical and Subtropical Aquaculture

Textbook Nutrition

Food Science and Human Nutrition’s latest edition adds an interactive layer

Welcome, Rock

Dr. Zhi-Yan Du joins MBBE

Men’s Wear

FDM professor is featured in a new book on masculine clothing

A Virtual Garden

The American Society for Horticultural Science’s online conference is a hit

RU AgCurious?

GoFarm Hawaiʻi Windward kicks off another farmer training

Giant Smiles

4-H contest gets keiki excited about agriculture

Safe You, Safe Campus

IT Services’ new app is mandatory for those coming to UH

Earth Mother

UH Center for Hawaiian Studies’ webinar is tonight at 7:00 p.m.

Not-Fun Spoofing

Beware of attackers impersonating CTAHR IT staff

Mission: Possible

Dean Comerford hosts a virtual Town Hall for Alumni and Friends

Conserving Kāhuli

Can structured decision-making save the Hawaiian Tree Snail?

Renaissance Agent

Molokaʻi Extension welcomes Marshall Joy

Positioned for Growth

Thesis explores a clonal rootstock program for cacao in Hawaiʻi

Bad Seed

USDA investigates packages of unsolicited seeds from China

Fire and Rain

SOEST and CTAHR document the first hurricane to cause both flooding and multiple fires.

Bringing UH to Cambodia

FCS joins a $1 million project to study socioeconomic and environmental shifts.

Sweet!

Learn about Native Hawaiian sweet potato varieties

Vegetable Garden Isle

Extension agents feed the hungry with the fruits of their research

Soil Rx

Extension offers conference on soil health

Mama Cows

Agent offers webinar on choosing heifers for cow/calf producers

Fashion Fights COVID

FDM alumna’s fashion-forward scrubs benefit Hawaiʻi Food Bank

12345678910Last