How to Keep Sunflower Seeds From Getting Moldy


Sunflower seeds are excellent savers for the next planting season; whether they are purchased seeds that did not get planted or seeds harvested from sunflowers you've raised. In order for sunflower seeds to germinate, sunflower seeds must receive proper care and storage to prevent molding and decay. Additionally, one seed's decay can ruin an entire collection of seeds when stored in the same container. Minimizing the danger of mold overtaking your sunflower seeds requires a few straightforward steps.

Step 1

Spread harvested sunflower seeds out on top of the window screen. Skip to step 4 if storing leftover purchased seeds.

Step 2

Place the screen in a sunny, airy place either indoors or outside away from moisture and humidity.

Step 3

Allow sunflower seeds to dry for four to six weeks.

Step 4

Place dried sunflower seeds in a glass jar. Place a paper towel or piece of newspaper inside the jar with the sunflower seeds. Put the lid on the jar and tighten.

Step 5

Store the jar in a cool, dry place away from extreme temperatures until planting season. Avoid opening to "check" on the sunflower seeds. Seeds that are thoroughly dried and put in a sealed container will not develop moisture, which is required for mold to establish.

Things You'll Need

  • Sunflower seeds
  • Glass jar with lid
  • Old window screen


  • Gardening for Wildlife: Storing Seed & Feed to Prevent Spoilage & Insects
  • University of Illinois Extension: Harvesting & Handling Sunflowers
  • Prepared Pantry: Quick User's Guide to Sunflower Seeds

Who Can Help

  • Sunflower Guide: How to Harvest & Dry Sunflowers
Keywords: preventing mold on sunflower seeds, storing sunflower seeds, proper storage of sunflower seeds

About this Author

Patricia Hill is a freelance writer who contributes to several sites and organizations, including eHow, Associated Content, Break Studios and various private sectors. She also contributes to the online magazine,