Tone in "To His Coy Mistress"

In the poem, “To His Coy Mistress”, Andrew Marvell uses an almost fairy tale tone. It is somewhat difficult to understand on first reading because he embellishes almost every line. Through the speaker’s use of exaggeration he displays imagery in his poem. However, because of the exaggeration, it is a fairy tale image. Using this embellished image, the speaker tries to convince this maiden that he loves her so much, but it seems he is only toying with her in an attempt to satisfy his lust for her. It’s as if he is telling her how good looking and gorgeous she is, just to get in bed with her. For example: “My vegetable love should grow/Vaster than empires, and more slow./ An hundred years should go to praise/ Thine eyes, and on thy forehead gaze,/ Two hundred to adore each breast, / But thirty thousand to the rest.” (Marvell, lines 11-16) I am not really sure what, “vegetable love” is, but it seems to me as if the speaker is joking with this woman. However, the speaker may be lost in his love for the woman he is speaking about. If this were the case, I’m not sure that even the woman would understand what he is talking about and with all this ridiculous exaggeration, the poems sounds silly.