Host an Event Volunteer Join Tickets

Support the plant database you love!

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
Not Yet Rated

Thursday - November 06, 2014

From: Conway, AR
Region: Southwest
Topic: Edible Plants, Shrubs
Title: Are American Hazelnuts Self-Fertile?
Answered by: Anne Van Nest

QUESTION:

I planted an American Hazelnut a couple of years ago that I ordered from a catalog. Is this plant self-fertile or do I need to plant another one? I have seen conflicting information on this subject.

ANSWER:

The Lady Bird Johnson Wildflower Center Native Plant Database has good information about this valuable native shrub. American hazelnut (Corylus americana) is a dense, mound-shaped, thicket-forming shrub, 6-12 ft. tall. Yellowish-brown catkins are showy in late winter and early spring. The female bloom is small and obscure, looking like red filaments. The male flowers are the long catkins. Edible nut with ragged papery husk. Fall color varies from bright yellow to deep wine-red.

Plants for a Future writes that the hazelnut flowers are monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and are pollinated by the wind. The plant is self-fertile.

Hazelnut is one of the first things to flower in the early spring, says Restoring the Landscape on their website. In early to mid April before the leaves have emerged, the male flowers (catkins) start to elongate on the stem and turn a bright yellow as the pollen matures.

You have to look a little more closely for the female flower which is also attached to the woody stem in a scale like bud. The stigma and styles are a bright red and start to protrude to catch the wind borne pollen from the end of the scaled bud.

And the Friends of the Wildflower Garden website says that the plant is monoecious (separate male and female flowers). The male flowers are very conspicuous light brown catkins, 2 to 5 inches long, appearing in a cluster of 2 or 3 on the sides of small branches near the branch tips opening before the leaves appear. These appear on the branches in the fall but open in the spring. The male flowers on the catkin have 4 stamens surrounded by two small bracts. The female flowers are quite small, with several rising from what appears to be a bud near the end of a twig in early spring. Only the stigma and styles protrude, looking like thin red threads. After pollination by the wind, the male flowers wither away and the pollinated female flowers mature to a 1/2 inch diameter edible brown nut that is enclosed in a leaf-like hairy bract that has ragged edges. This is green initially, becoming brown at maturity. Nuts will usually be in a cluster of 2 to 5.

 

Your hazelnut should produce fruit without cross-pollination and at an early age (3-4 years), but if you find that the quantity of fruit is not sufficient, you should get a better fruit set if there is another Corylus (it doesn’t have to be the same species just as long as it is blooming at the same time) in the vicinity.

 

From the Image Gallery


American hazelnut
Corylus americana

American hazelnut
Corylus americana

American hazelnut
Corylus americana

American hazelnut
Corylus americana

American hazelnut
Corylus americana

More Edible Plants Questions

Identification of a cucumber-like vine with fruit
November 16, 2011 - We found tiny, grape-size white melon-like fruit on a vine, with tomato-like/cucumber-like seeds. The leaves on the vine were similar to grape or cucumber leaves, but not spiny. They were behind our...
view the full question and answer

Identification of shrub/small tree with small purple fruit
July 31, 2013 - Hi! I have a tree/bush that has come up on its own in the backyard. This year it set what looks like small purple plums. Is there any chance that they might be poisonous?
view the full question and answer

Can bastard cabbage be eaten from Austin
May 02, 2013 - On a local cooking show they were talking about cooking local foods and mentioned bastard cabbage but never showed how to cook it or if it was in fact edible. Would be a way to help get rid of it if ...
view the full question and answer

Books on edible wild plants for Michigan
September 10, 2009 - What book do you recommend to find edible wild plants in Michigan? I've found several books on edible plants, but they are all centered on the western states.
view the full question and answer

Problems with non-native tomatoes from Spokane WA
August 18, 2012 - I have 2 tomato plants in 1 whiskey barrel, they are in abundance with tomatoes. My problem is when the tomatoes start to ripen, half green & half light red within 1 day the tomatoes are really soft ...
view the full question and answer

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