Rent Shop Volunteer Join

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
1 rating

Friday - July 25, 2008

From: Berlin, NH
Region: Northeast
Topic: Soils, Edible Plants, Shrubs
Title: Failure of highbush blueberry plant to produce in New Hampshire
Answered by: Barbara Medford

QUESTION:

One of my highbush blueberry plants completely stopped producing. What can I do to revive it?

ANSWER:

Vaccinium corymbosum (highbush blueberry) is native to New Hampshire and most cultivated blueberries are varieties or hybrids of the highbush blueberry. They are accustomed to wet to dry acid, rocky soils, and are extremely susceptible to chlorosis due to alkalinity in the soil.

Proper fertilizing of blueberries can be a little tricky. They evolved with shallow roots in low-nutrient acidic environments, and roots are easily burned by fertilizer. Yet, to get good fruit production demands fertilizer in late winter or early spring and again in late spring. One recommendation is for slow-release acid fertilizers such as those for rhododendrons and evergrees. Avoid concentrated fertilizers near the blueberries, and do not fertilize later than June. Another possibility is to use shredded hardwood bark or composted bark to mulch and shelter the roots from the cold and also to continue to add acidity to the soil, without disturbing the shallow roots for fertilizers.

Some of the stresses on blueberries that can cause reduction in production are insufficient sun, insufficient water or poor soil drainage. Young bushes need minimal trimming. Fruit is produced on second-year wood, so excessive pruning should be avoided. Most cultivars require cross-pollination with another cultivar. They are pollinated by bees, so avoid insecticides to encourage the natural bee population.

That's about all we could find that might be affecting the production of your highbush blueberry. Compare the conditions in which they are growing in your New Hampshire garden (approx. Zone 5a) and see what is wrong that you can fix.


Vaccinium corymbosum

Vaccinium corymbosum

Vaccinium corymbosum

Vaccinium corymbosum

 

 

 

 

 

More Shrubs Questions

Privacy Screen for Heavy Clay and Full Sun in Louisiana
April 19, 2013 - What would be a fast-growing plant for privacy in Louisiana? I have heavy clay and full sun.
view the full question and answer

Age at which native agarita produces berries
July 28, 2004 - At what age does agarita produce berries? Is this plant self pollinating?
view the full question and answer

Plants for steep bank in Pennsylvania
July 12, 2011 - What do I do with a very steep bank with hard clay soil to stop erosion and to look nice. Is there a ground cover that would help?
view the full question and answer

Plants for northern exposure in Wichita, KS
March 17, 2009 - What are good plants for the north side of the house with acidic soil in Zone 6, Wichita, KS?
view the full question and answer

Trees for clay soil from Charlotte TX
August 25, 2013 - We have an area in our yard that even Esperanzas won't grow. It is near another that does great. Six Esperanzas are planted in a north/south row about with 10' between plants, the southern most plan...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.