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Lincoln County Master Gardener™ Association

Lincoln County Frost Dates

Last and first frost dates are 30% probability, calculated using 1991-2020 Climate Normals from NOAA. Local information obtained at: https://www.almanac.com/gardening/frostdates.


Using a 30% probability threshold, means there’s about a 3 in 10 chance frost will occur before or after the given date. In general, it should be safe to plant after this date. Tender plants may need to be planted later when the soil is warmer. Because microclimates vary—your backyard might be warmer or cooler than nearby towns—use these dates as a flexible guide, not a guarantee.

LocationClimate StationLast Spring FrostFirst Fall FrostGrowing Season
Depoe BayNEWPORT 3NMar-28Nov-26242 days
EddyvilleALSEA FH (FALL CREEK)Apr-23Oct-24183 days
HarlanALSEA FH (FALL CREEK)Apr-23Oct-24183 days
Lincoln CityOTIS 2 NEApr-18Nov-8203 days
LogsdenNEWPORT 3NMar-28Nov-26242 days
NeskowinOTIS 2 NEApr-26Nov-26203 days
Newport & South BeachNEWPORTApr-1Nov-15227 days
OtisOTIS 2 NEApr-18Nov-8203 days
Otter RockNEWPORT 3NMar-28Nov-26242 days
Seal RockNEWPORT 1 SEFeb-26Dec-4278 days
SiletzNEWPORT 3NMar-28Nov-26242 days
TidewaterALSEA FH (FALL CREEK)Apr-23Oct-24183 days
ToledoNEWPORT 1 SEFeb-28Dec-4278 days
WaldportYACHATS, ORMar-2Dec-1273 days
YachatsYACHATS, ORMar-2Dec-1273 days

Featured Image by Alfons Landsmann from Pixabay.

Hydrangeas (KYAQ Audio)

In this edition of the Lincoln County Gardner, host Ross McCann talks with Master Gardener Mary Jane Bonelitz about Hydrangeas (Hydrangea macrophylla and Hydrangea paniculata). The Oregon coast provides almost perfect conditions for this popular plant.

Lacecap variety of Hydrangea macrophylla; Image by Sandra Ferentschik from Pixabay. Featured image by Hans from Pixabay
"Oak Leaf" Hydrangea paniculata. Image by Ria Sopala from Pixabay.

Lincoln City’s Connie Hansen Garden (KYAQ Audio)

In this edition of the Lincoln County Gardner, host Ross McCann talks with Master Gardeners Cheri Rice and Terry DeJongh. They volunteer at Lincoln City's treasure, the Connie Hansen Garden.

All images courtesy of the Connie Hansen Garden. Find out more at the garden's website: https://www.conniehansengarden.com/

Rock Gardens (KYAQ Audio)

In this edition of the Lincoln County Gardner, Ross McCann talks with Master Gardener Larry King about rock gardens. Learn about the many types of rock gardens and the basics of construction and plant selection.

Here's a photo of the refurbished rock garden in the South Beach OSU demonstration garden. Note the rocks (underpinned by cement blocks) to give height and interest in the background. All photos by Larry King and used with permission.
The view from the other side shows how we incorporated some of the existing native plants: Seaside Daises (Erigeron glaucus left, lower) and Oregon Iris (Iris Tenax left, upper). In the center of the picture, with small yellow flowers is Lavender Cotton (Santolina chamaecyparissus). It soon took over the end of the rock garden and needed regular pruning to keep it in check.

Mycorrhizal Networks (KYAQ Audio)

In this edition of the Lincoln County Gardner, Ross McCann talks with Master Gardener Herb Fredricksen about fungi and their part in creating Mycorrhizal Networks. You'll even get a history lesson on how fungi and plants evolved.

Herb's fun fact: Scientists say their DNA tests prove that a single Armillaria organism covers nearly 3 1/2 square miles under the Malheur National Forest. Image by Todd Sonflieth of Oregon Public Broadcasting. Featured image of Mycorrhizal Fungi courtesy of University of New Hampshire Extension Services.

The Five Kinds of “Bulbs” (Audio)

Sometimes we have too much material when editing our KYAQ radio show and important information doesn't make it into the episode. In this case, Master Gardener Joan Crall does a wonderful job of describing the five kinds of "bulbs" that produce spring displays of flowers. Master Gardener Ross McCann is the interviewer. Joan covers true bulbs, corms, tubers, tuberous roots and rhizomes.

Bulb

  • Structure: A bulb is composed of modified, fleshy leaves (scales) wrapped around a central bud, with a basal plate at the bottom.
  • Function: Stores energy and nutrients to survive and grow a new plant.
  • Examples: Tulips, daffodils, lilies, and onions. 

Corm

  • Structure: A solid, swollen underground stem with a papery outer covering (tunic). It is not made of layered leaves.
  • Function: Stores food reserves in the stem tissue.
  • Examples: Crocus, gladiolus, and freesia. 

Tuber

  • Structure: A swollen stem or root that stores food. It has "eyes," which are buds that can sprout new shoots.
  • Function: Stores nutrients for the plant's growth.
  • Examples: Potatoes and caladium (stem tubers) and dahlias (tuberous root). 

Rhizome

  • Structure: A horizontal stem that grows underground or along the surface, with roots and shoots developing from nodes along its length.
  • Function: Serves as both a storage organ and a primary means for vegetative reproduction and spreading.
  • Examples: Ginger, iris, and canna.
In cross section, a true bulb has all of the parts visible that will form the whole plant. Diagram courtesy of University of Florida. Featured line drawing courtesy of Thursd.

Composting (KYAQ Audio)

In this edition of the Lincoln County Gardner, Ross McCann talks with Master Gardener Cathi Block about composting. She makes it easy to get started in this sometimes-confusing process.

A great place to start composting is with your own kitchen trimmings and waste. Image by Couleur from Pixabay. Featured image from the South Beach Demonstration Garden's 3-stage composting bins. Image provided by Steve Vogel.

Master Gardener Program (KYAQ Audio)

In this edition of the Lincoln County Gardner, Ross McCann is on vacation, so Master Gardener Larry King talks with OSU Extension Service employee Stormi Dykes about the Master Gardener program. Stormi administers the program for Lincoln County.

Featured image of gardener by Anil sharma from Pixabay.

Holiday Blooming Bulbs (KYAQ Audio)

In this edition of the Lincoln County Gardner, Ross McCann talks with Master Gardener Joan Crall about growing bulbs for winter holiday display. Both amaryllis (Hippeastrum) and paperwhites are discusses.


Hippeastrum unnamed variant, image by Annette Meyer from Pixabay. Featured image of Narcissus tazetta 'Ziva' growing outdoors in Arkansas, but more commonly "forced" indoors for winter display. Image by Mike Goad from Pixabay.

Fall-Planted Bulbs (KYAQ Audio)

In this edition of the Lincoln County Gardner, Ross McCann talks with Master Gardener Joan Crall about the many kinds of bulbs that you can plant in the fall for spring bloom. She covers selection, planting and long term care.


Narcissus triandrus 'Thalia' is one of thousands of varieties of "daffodils." Thalia's flower is orchid shaped, scented and naturalizes well in Lincoln County. Photo courtesy of Colorblends Wholesale Bulbs. Featured image of Wooden Shoe Tulip Festival in Canby, OR, courtesy of Wooden Shoe Tulip Farm.