Couple uses social media to share their "guerrilla gardening" techniques

Shalaco and Phoenix McGee have been leaving their colorful mark on the streets of San Francisco for the last decade. 

On their first date, they planted an aloe bush and that was the seed that inspired a project to plant native wildflowers in empty lots across their city. 

"We plant native pollinator seeds in neglected areas of land and it's just a nice way to make a forgotten about space, you know, full of full of flowers," Shalaco told CBS News' Lilia Luciano.