Container-grown hazelnut trees provide head start
The hazelnut trees in Ron and Daniel Chapin’s older orchards have remained remarkably productive despite the fact they’re dying.
As eastern filbert blight kills many of their trees, the father and son still hope to get as many hazelnuts from them as possible.
At the same time, they want to get a head start replacing the orchards with new varieties that are resistant to the fungal pathogen.
Their solution is to begin growing young hazelnut trees for two years in 15-gallon containers in preparation for transplanting.
That way, the Chapins won’t have to wait as long for the replacement orchards to begin yielding enough nuts to harvest, which usually occurs in the fifth year, Ron Chapin said. “It gets us to production quicker.”
The strategy also makes sense for fields currently producing other crops, he said. “The biggest thing is the extra two years you’ve got to do whatever with the ground.”
Aside from time savings, the containerized hazelnuts provide an agronomic advantage, said Nik Wiman, orchard crops extension specialist for Oregon State University.
Currently, many yearling hazelnut trees are being planted across Oregon even though they probably should have been culled, said Wiman.
Demand is so high for young hazelnut trees that growers are willing to settle for lower-quality specimens, he said.
“We’re limited by plant material, essentially,” Wiman said.
Trees that have spent a couple years in a container have a more developed root structure and should perform better, he said. “That’s what we really need when transplanting the tree.”
Of course, planting larger trees grown with this system does have a downside — handling 45-pound containers is more difficult than yearling “whips” that can be carried around in a sack.
“Logistics is going to be the challenge for us,” said Daniel Chapin.
The bigger, heavier containers take roughly twice as much time to plant and require preparing holes with a tractor-mounted auger. Transport is another issue — it would take a semi-trailer to haul the 300 trees needed to plant about two acres.
Even so, the Chapins are optimistic about their strategy because fewer than 1 percent of the container-grown Jefferson trees they plant end up dying, compared to roughly 3 percent of the variety that die when planted as whips.
Part of the improvement is that deer aren’t as likely to completely destroy the larger trees, said Daniel. “You have a tree that’s much better prepared to defend itself.”
They’re also experimenting with growing trees in 10-gallon containers, which would be easier to handle.
However, the Chapins are hesitant about the prospect of using smaller pots, since tree roots would be more prone to “swirling” in on themselves, resulting in a weaker root structure in the field.
“We need to make sure it’s a big enough pot to fully accommodate the roots,” Daniel said.
The Chapins have planted about 40 acres with containerized hazelnuts, and plan to replace 250 acres of orchards with this method over the next five years.
“I figure by that time, I’ll understand it well enough that I won’t mind selling it to other people,” said Ron.
Given the time, labor and inputs involved, each containerized tree would have to sell for $25-30, compared to $5.50 for a whip, he said. “It’s a more intensive culture for it.”