High Tunnel Tomatoes - Early Pruning Pays off
Amy Ivy, Vegetable Specialist
Eastern New York Commercial Horticulture
May is an insane time around any NY vegetable farm and it's a challenge to prioritize the mountain of tasks each day. But a little time spent pruning and training your high tunnel tomato plants now can really pay off later. Not only will they yield better, your labor will be more efficient during harvest since workers won't be plowing through a dense tangle of leafy stems to get to the tomatoes.
Here's a quick review:
Remove lower leaves up to the first fruit cluster. Bend the leaf up, then down and it should snap off cleanly, making quick work of this simple but important task. Why? It increases airflow around the plant to discourage disease and makes the plant easier to work around.
Strong Y - whether you are training determinate or double leader indeterminate (see below) start both with the Strong Y. See the photo to locate the weaker suckers to remove and the co-dominate sucker to keep just below the first flower cluster. Allow only the main leader and co-dominate leader to develop, removing all the other suckers and leaves up to this ‘Y' junction on the plant. Why? The lower suckers are less productive. Removing them sends the plant's food energy to the remaining stems, shoots and fruit.
Determinate tomatoes - train them to the ‘stake and weave' aka ‘Florida weave' system. Set a post between every 2-3 plants and start the horizontal twining early so the plants can grow up through the support. Why? This level of support will keep the aisles open for efficient worker movement and will keep the fruit up off the ground for easy harvest.
Indeterminate tomatoes - For large slicing tomatoes some growers prefer single leaders, some prefer double. When in doubt, the double leader system works well in most situations.
In our cherry tomato trial we found the double leader system was the best option in terms of labor efficiency and yield, compared to a single or multi leader system.
Check out these helpful factsheets for more photos and details:
- Training and Pruning Tomatoes: https://rvpadmin.cce.cornell.e...
- Tomatoes for High Tunnels: https://rvpadmin.cce.cornell.e...
- Cherry Tomatoes in High Tunnels: https://rvpadmin.cce.cornell.e...
- Optimal Spacing for High Tunnel Tomatoes: https://rvpadmin.cce.cornell.e...
This article is from the May 3, 2018 edition of ENYCHP Vegetable News. To read the full newsletter,CLICK HERE.
Apples
Apricots
Asparagus
Beets
Blueberries
Broccoli
Brussels Sprouts
Cabbage
Carrots
Cauliflower
Cherries
Cucumbers
Dry Beans
Eggplant
Ethnic Vegetables
Garlic
Grapes
Horseradish
Kohlrabi
Leeks
Lettuce / Leafy Greens
Melons
Nectarines
Onions
Parsnips
Peaches
Pears
Peas
Peppers
Plums
Potatoes
Pumpkins / Gourds
Radishes
Raspberries / Blackberries
Rhubarb
Rutabaga
Snap Beans
Squash - Summer
Squash- Winter
Strawberries
Sweet Corn
Sweet Potatoes
Tomatoes
Turnips
Upcoming Events
2026 Northeast Extension Fruit Consortium Winter Webinar Series
February 4, 2026 : Management of Up and Coming Strawberry Diseases in the Northeastern United States
Session 1: Management of Up and Coming Strawberry Diseases in the Northeastern United States
February 11, 2026 : Kiwiberry Production in the Northeast
Session 2: Kiwiberry Production in the Northeast
February 18, 2026 : Heat Mitigation- Sunburn and Fruit Coloring
Session 3: Heat Mitigation- Sunburn and Fruit Coloring
February 25, 2026 : The Dating Game- Updates in Lepidopteran Mating Disruption
Session 4: The Dating Game- Updates in Lepidopteran Mating Disruption
March 4, 2026 : USEPA Endangered Species Act Strategies and Pesticide Use
Session 5: USEPA Endangered Species Act Strategies and Pesticide Use
March 11, 2026 : Practical Drought Management for Fruit Growers
Session 6: Practical Drought Management for Fruit Growers
Managing the Invasive Swede Midge Webinar
March 6, 2026 : Managing the Invasive Swede Midge Webinar
Swede midge is an invasive fly that causes serious economic losses to brassica crops. Due to its small size and hidden feeding habits, swede midge is often called an "invisible pest" and damage may be misdiagnosed. In this webinar, we will review the swede midge life cycle and crop damage symptoms, current management recommendations, new research findings, and highlights from on-farm case studies with a focus on organic management.
New Farm Manager Skills Day - Get the Tools You Need to Grow Your People (Hudson Valley)
March 10, 2026 : New Farm Manager Skills Day - Get the Tools You Need to Grow Your People
Millbrook, NY
Are you moving into a supervisory farm management role this season and want to get off to a good start? Are you an experienced manager who wants to connect with other "people" managers and work on your skills? This one-day workshop is for you!