Emilyies garden

I haven't told my garden yet --
Lest that should conquer me.
I haven't quite the strength now
To break it to the Bee --

I will not name it in the street
For shops would stare at me --
That one so shy -- so ignorant
Should have the face to die.

The hillsides must not know it --
Where I have rambled so --
Nor tell the loving forests
The day that I shall go --

Nor lisp it at the table --
Nor heedless by the way
Hint that within the Riddle
One will walk today --

In this poem she's trying to show her connection to her garden.

She was known to be a talented Gardner. 

That coupled with the fact that she was incredibly anti-social, it would make sence that she convey's her message of her death to her garden before anyone else.