Basil - Sprinkle Basil over your lover's body while they sleep and this will ensure fidelity. If a man accepts Basil from a woman it indicates his love for her.
Betony - Can reunite quarrelling lovers.
Borage - Women would sneak Borage into their lover's drink to give them the courage to propose marriage.
Broom - To increase a newly-wed couple's fertility, they would jump over a branch of broom bearing flowers.
Coriander - Used in love potions in the Middle Ages.
Cumin - If a bride and groom carry Cumin seed when they marry they will have a happy life together.
Dill - Add to a bath or eat as an aphrodisiac.
Honeysuckle - Symbolic of fidelity and love.
Lavender - Spouses who places Lavender flowers in their bed will never quarrel.
Oregano - Used to crown newly-weds.
Flax - String Flax around the left leg of the bride and she will definitely have children.
Rosemary - Was used in wedding garlands.
Sneezewort - Bunches of Sneezewort were carried by West Country bridesmaids to bring happiness to the newly-weds. To reinforce this, Sneezewort leaves were eaten at the wedding feast.
Sweet Violet - Symbolic of faithfulness and love.
White Clover - Believed to be the original Shamrock of Ireland and so very lucky.
Wild Pansy - 3 colours - purple: memories, Yellow: souvenirs, White: thoughts of love.
Yarrow - If eaten at the wedding feast the couple will remain in love. For similar reasons, bridesmaids would carry Yarrow flowers.