Sarah the gardener here,
Yes Spearmint (Mentha spicata) is invasive.
Yes you can pick the leaves and eat, dry, or make tea or oil.
I'm copying off the seed packet info.
"Containerize unless a patch is desired".
"Creeping perennial thrives in moist rich soil in sun or shade"
Horizon Herbs, LLC
PO Box 69
Williams, or 97544 USA
Certified Organicby Oregon Tilth
Yes Spearmint (Mentha spicata) is invasive.
Yes you can pick the leaves and eat, dry, or make tea or oil.
I'm copying off the seed packet info.
"Containerize unless a patch is desired".
"Creeping perennial thrives in moist rich soil in sun or shade"
Horizon Herbs, LLC
PO Box 69
Williams, or 97544 USA
Certified Organicby Oregon Tilth