Male and Female Plants, and Plants That Clean Soil
Ellen and C.L. discuss plants that male or female, how some plants are used to remove harmful substances from the soil, and why it might be good to test old seed instead of automatically tossing it out.
:27 Plant Noob: Dioecious plants
8:33 Eat/Drink/Grow: Phytoremediation
16:48 Love Letters and Questions: Karen wrote to ask about the seeds she has left from past years.