What is this in my blueberries?

I started a few blueberry plants last year in containers and moved them into the greenhouse to over winter. They have started to come back around, and I noticed one of them has some new companions.
What the heck are they and should I get rid of them?

It looks like you have two different plants there -

I'm wondering if the brighter green one is chickweed (Stella media)?


It is a common annual - quite nice as a salad leaf. I can't really tell from the photo though.

The other looks like some sort of Oxalis - maybe oxalis corniculata:



That can be invasive I gather depending on your climate. Again edible leaves, although tend to be a bit tough in my experience.

Hello Joshua!

That looks like Creeping Woodsorrel.

I like to nibble on them, they have kind of a lemony flavor.  They are a common weed that comes with nursery transplants.   I think they are nice but some people find them to be trouble because they will spread.  You can just pull them out and give them to your chickens or rabbits.  
They can be beneficial by providing ground cover, suppressing other weeds, adding organic matter and attracting pollinators,

Wood sorrel!

They should be mostly harmless. They might even be beneficial as they have very acidic tissues that maybe leach into the soil and make it more hospitable for the berries, but that is speculative. They’re also edible and tasty. My favorite parts are the growing shoots and the immature seedpods.