Aren’t there hydrangea in Philippines?

Aren’t there hydrangeas in Philippines?

I told the teacher on during our Skype lesson about “the hydrangea festival” yesterday,

I recommend: "I told my teacher"

but she didn’t know wasn't familiar with the hydrangea.

Other possibility: ", but she didn't know about the hydrangea."

I posted a lot of pictures of the hydrangea on the Facebook so I sent her a the link of it.

But she can’t see the Facebook at the office.

I recommend: ", but she can't log on to Facebook at the office."

Then I sent the another link of other the hydrangea’s picture.

, but she also can’t see this one them again.

I tried to explain about the hydrangea, but I couldn’t.

Maybe: "I tried to explain what the hydrangea was, but I couldn't."

Maybe what she knew was that the hydrangea is was a kind of flowers and they bloom in the rainy season.

I suggest: "Maybe what she knew was that the hydrangea was a flower and that they bloom in the rainy season."

I wonder why my teacher can’t see the Facebook at the office.