exert taken from http://flockoffairies.com
Bluebells
Said to attract faeries to dance in your garden. On Beltane eve, make an ankle braclet of "Bluebells" and "jingle" bells to attract helpful fae folk to you.
Clover
A sacred faery plant, clovers of all kinds will attract them. Lay seven grains of wheat on a four-leafed clover to see the Faery.
Elderberry
Used to make Faery wine, these berries can be burned on a fire to invite the Good Folk to a gathering. Make a homemade brew of Elderberry Wine and you are sure to have some thirsty visitors. It is said that if a human drinks the wine, she will be able to see the Faery. If a human should drink Elderberry wine from the same goblet as a Faery being, he will be able to see them forever after.
Elecampagne
Also known as Elfswort. This root can be scattered around the home to attract the Sidhe. It can be added to any magick or spell to invoke Faery blessing.
Foxglove
The source of the modern heart drug Digitalis, Foxglove can have seriously dangerous results if taken internally. DO NOT INGEST!! Instead, plant Foxglove near your front door to invite the Faery in. Put a dried sprig of Foxglove in a talisman to keep you surrounded in Faery light.
Heather
Heather is said to ignite faery passions and open portals between their world and our own. Make an offering of Heather on "Beltane" eve to attract good fae to your garden
Lilac
The sweet scent is said to draw Fae spirits to your garden. Lilac and primroses for midsummers eve, will please the Fae.
Mistletoe
The most sacred herb of the Druids. Mistletoe is a magickal activator. In Faery spells, use a dash of Mistletoe taken on Summer Solstice to empower your workings with Faery magick.
Milkweed
Both Monarch butterflies and fairies like milkweed. If Milkweed is planted in a Witches garden, the fey will always be in the area. The silky tassels of the Milkweed pods can be added to a dream pillow to not only make it softer but also to make you dream of fairies. In the Autumn when the pods are bursting and the fluffy seeds are flying across the fields, a wish is granted for each seed that can be caught and then released again.
Peony
Peony seeds were once used to protect children from faeries. A garland of the seeds were placed around the child's neck to keep them safe from kidnapping. In this day and age, with faery contact so drastically diminished, I doubt that anyone would want to don this faery banishing herb unless they were living smack dab in the middle of a circle of crazed Fae!!
Poppies
Said to invoke the faery into your dreams Make a dream pillow of fresh poppies to entice the fae to your dreams.
Primrose
When planted in a garden or hung dried on the front door, primroses will attract the company of Faeries. If you have them growing under your care, do not let them die! The Faery will be deeply offended by your carelessness. Primroses are great in container gardens. Tie a pink ribbon around your container of Primroses while chanting;
"Sacred roses, hear my cry
for your protection, this I tie"
Roses
Roses attract the Faery to a garden. Their sweet scent will lure elemental spirits to take up residence close by. Roses can be used in Faery love spells. When performing the spell, sprinkle rose petals under your feet and dance softly upon them while asking the Faery for their blessing on your magick.
Roses are loved by the fey so you can plant Roses in your garden to attract fairies. Wild Roses are best for this purpose and you need to say the following spell as you plant your baby Rose bush:
"I ask a fairy from the wild,
To come and tend this wee rose-child.
A babe of air she thrives today,
Root her soul in the Goddesses' good clay.
Fairies make this twig your bower,
By your magic shall time see her flower!"
Thyme
Wearing thyme will increase your ability to see the Sidhe. Sprinkle it at the base of your door, and on window sills to invite the Faery to enter your home
From Flock of Fariries