Hehe.* The mother nature fairies did it!* :D* Yes, they are morning glories and petunias and both are annuals. That means in one season or year the entire plant grows from seed, flowers and produces more seed.* Then the parent dies, leaving behind it's seeds.* Morning glory seeds have a very hard coat and can stay dormant in the soil for many years.* I have some that have sprouted after 6 years in the ground.* If you cultivated the ground then you probably brought them to the surface.*
I have petunias that have reseeded as well.* Neither the petunia or morning glory will come true from seed, so they won't look like their hybrid parents.* I always plant the wave petunia in a large pot in my front yard.* I plant the dark purple.* This year I have some fuschia and some white ones that the fairies planted in the ground.* The morning glories also don't look like their parents.* If you need me to explain the hybrid thing just lmk.*
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.