Dear fellow NH gardener,

Thank you for contacting the UNH Extension Infoline regarding your future gardening plans.

Following up on your call from 4/8/2026, I’ve attached some general information to help get you started. We are committed to finding the right solution for your lawn and garden and are happy to provide further guidance as needed. Please feel free to reach out with any further questions.

Best regards,

Haim
Master Gardener Volunteer
UNH Extension Infoline Team

General Information

It’s great that you're jumping back into gardening! Dealing with potato and squash bugs can be incredibly frustrating, but your 3-4 year break has actually given you a significant advantage.

Here are the answers to your specific questions based on common New Hampshire gardening research and UNH Extension guidelines:

https://extension.unh.edu/resource/managing-squash-vine-borer-problems-new-hampshire-fact-sheet

1. Will the bugs be gone after 3-4 years?

• Locally: Yes, any bugs that were overwintering in your specific soil are likely gone because they lacked a food source (host plants) for several seasons.
• The Catch: Unfortunately, both squash bugs and potato beetles are strong fliers. They can easily travel from a neighbor's garden to yours once they smell your new plants.
• Strategy: While your soil is "clean," you should still expect some to arrive by air. Using row covers (lightweight fabric) over your young plants until they start flowering is one of the best ways to physically block these "new arrivals" from laying eggs.
  
  

https://extension.umn.edu/fruit-and-vegetable-insects/squash-bugs

2. Should you use insecticide?

• Your Current Tools: Neem oil and diatomaceous earth (DE) are excellent organic options, but they work best as preventatives or on very young "nymph" stages. They often struggle to kill fully grown, "armored" adult bugs.
• Insecticide Advice: You don't necessarily need heavy chemicals, but you might consider "softer" insecticides if things get out of hand. UNH Extension notes that products containing spinosad (like Captain Jack’s Dead Bug Brew) can be more effective than neem on certain stages while still being naturally derived.
• The "Secret Weapon": In small raised beds like yours, hand-picking is often more effective than any spray. Checking the undersides of leaves for bronze-colored squash bug eggs every few days and scraping them off with duct tape can stop an infestation before it starts.
  
  

https://extension.unh.edu/sites/default/files/migrated_unmanaged_files/Resource001192_Rep1517.pdf

Quick Tips for Success this Year:

• Resistant Varieties: Try planting "Butternut" or "Royal Acorn" squash, which are naturally less attractive to squash bugs than zucchini or yellow crookneck.
• Clean Up: At the end of the season, remove all dead vines immediately. This prevents any new bugs from finding a place to hide in your beds over the winter.

Choosing varieties specifically bred to handle pressure from squash bugs, vine borers, and potato beetles will make your return to gardening much more enjoyable. Since you are in New Hampshire, these varieties are particularly well-suited for our shorter growing season and local pest pressure:

https://ipm.cahnr.uconn.edu/resistant-tolerant-vegetable-varieties-are-worth-a-try/

1. Potato Beetle Resistant Varieties
The Colorado Potato Beetle is the primary culprit in NH. While no potato is 100% immune, some have natural defenses:

• King Harry: This is a top recommendation for organic growers. It has "hairy" leaves (glandular trichomes) that physically deter beetles from feeding or laying eggs.
• Russet Burbank: This classic variety has some natural tolerance, though it requires a longer season to mature.
• Early Varieties: Planting early-maturing varieties like Norland can sometimes allow you to harvest before the beetle population reaches its peak in mid-to-late summer.

2. Squash Bug & Vine Borer Resistant Varieties
Squash bugs and vine borers often go hand-in-hand. Varieties from the Cucurbita moschata family (like Butternuts) are naturally resistant because they have solid, tough stems that are harder for bugs to pierce.

• Waltham Butternut: A New England staple developed right in Massachusetts. It is highly resistant to vine borers and can tolerate squash bug pressure better than almost any other squash.
• Tromboncino (Rampicante): This is an Italian heirloom that can be eaten young like zucchini or left to mature like winter squash. It has an incredibly tough, solid stem that borers cannot easily enter.
• Tatume: A round Mexican squash that is exceptionally vigorous. Even if squash bugs attack one part of the plant, it often roots at other nodes along the vine to keep growing.

3. Naturally Pest-Free "Safe" Crops for NH
If you want a "win" this year with very little stress, these vegetables rarely face significant pest issues in New Hampshire raised beds:

• Root Crops: Onions, garlic, and leeks are almost entirely ignored by common garden pests and even help repel bugs from neighboring plants.
• Leafy Greens: Lettuce, Swiss chard, and kale grow quickly in our cool springs and usually finish before major summer pests arrive.
• Peas: Sugar snaps or shelling peas are great for early spring planting in NH and have very few pest enemies here.