I guess they can.

I wanna snuggle that meganium! *puppy dog eyes* pwease? I'll be good to her

Oh meh goodnesses! Wonderfully fatty flower! Photosynthesis times a billion! Gots to stock up on those ethers. Here ya go *hands you a bunch of ethers* X3

That big fatty neck makes her even more win! Hee hee, so floppy 'n jiggly looking and stuff! Hope that neck of hers doesn't mind bein' a little bigger, cause it looks like she's all happy with more and more sunlight! (I guess this is what happens when 1,000,000,000 hp is recovered lol) Oh, and of course her big squishy belleh will get bigger too if she keeps up the photosynthesis.
I say bring on the tanning mirrors!

oh yes they can