Portola Valley's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Portola Valley a growing zone designation of 9b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Portola Valley's climate. If you are looking for plants suitable for growing in the Portola Valley area, head on over to our page on plants that grow well in Portola Valley, CA.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Worm Composting Kit

Complete kit for starting your own worm composting system.

Metal Seed Storage Box

Organized storage solution for your seed collection.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

Understanding your growing zone is very important because it is a measure of the lowest temperature that a plant can survive, helping you to decide what plants would grow best in your particular climate. Since Portola Valley is in growing zone 9b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Portola Valley's climate should be chosen with this in mind or plants should be moved inside to keep their core temperature in the right range if necessary.

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.