Heather, all colors:  admiration ... protection from danger ...

Heather, lavender:  admiration ... solitude ...  

Heather, white:  protection ... Wishes will come true ...

Holly:  defense ... domestic happiness ...  good will ...

Hollyhock:  fruitfulness ... ambition ...

Honeysuckle:  generous affection ...

Hyacinth, all colors:  constancy ... games and sports ... rashness ... flower dedicated to Apollo ... kindness ...

Hyacinth, blue:  constancy ...

Hyacinth, purple:  I am sorry ... Please forgive me ... sorrow ...

Hyacinth, red or pink:  play ...

Hyacinth, white:  loveliness ... I'll pray for you ...

Hyacinth, yellow:  jealousy ...

Hydrangea:  heartfelt ... thank you for understanding ... frigidity ... heartlessness ... devotion ... rememberance ...