White Spring Flowers 4
Impatiens ‘Super Sonic White’ is a vigorously growing New Guinea Impatiens bred and selected for superior performance. It has large (up to 3 inches) white flowers, and is a bit more sun-loving than the other Impatiens. They will tolerate more sun if their roots are kept moist. Mature Height is 12 to 18 inches. Mature Spread is 9 to 12 inches. Plant in Full Shade to Partial Shade. For Zones 3-11. Can become a perennial in Zones 9-11. Impatiens are symbolic of “Motherly Love”. In the medieval Mary gardens devoted to the Virgin Mary, Impatiens plants were called “Our Lady’s Earrings.” The individual colors have not been given separate meanings.
The Iris ‘Immortality’ is a fragrant and reblooming bearded iris that has pure white flowers and cream colored beards. Deer Resistant. Drought Tolerant. Mature Height is 30 to 40 inches. Mature Spread is 18 to 24 inches. Plant in Full Sun to Partial Shade. For Zones 3-9. The Iris symbolizes “Faith, Wisdom, Valor, Hope, My compliments, Cherished friendship, Promise in love, and Inspiration. Irises were used in the religious Mary Gardens. The blade-shaped foliage represents “Mary’s Sword of Sorrows” denoting the sorrows which “pierced her heart”.
Jack in the Pulpit – Sikokianum
Jack in the Pulpit ‘Sikokianum’ has a spathe of dark purplish/brown and a white club-shaped spadix. Mature Height is 36 inches. Plant in Full Shade to Partial Sun at a depth of 4 inches, spaced 3 to 6 inches apart. For Zones 5-9.
White Foxtail Lily – Desert Candle
The photo and link will take you to the Lily Department. I cannot get a direct link for the White Foxtail Lily….BUT, if you will look at that page in the upper left search box, and insert 25528, it will take you to the direct page 
The Foxtail Lily ‘Desert Candle’ has showy white florets that open from the bottom upward. Mature Height is 4 to 5 feet. Plant in Full Sun. For Zones 6-9. Premium #1 grade root divisions that will establish themselves quickly in your garden. Shipping between 2/15/2010 and 05/28/2010.
The Lily of the Valley is a fragrant white Lily-of-the-Valley that is unusual because its bell-shaped flowers are actually double! Mature Height is 6 to 8 inches. Plant in Full Shade to Partial Sun at a depth of 3 inches, spacing them 1 to 2 inches apart. For Zones 3-9. Lily of the Valley’s symbolism is “Sweetness, Tears of the Virgin Mary, Humility, You’ve made my life complete, Return to happiness, and Trustworthy”.
Lily – Oriental ‘Casablanca’ produces large fragrant white blooms. Mature Height is 36 to 60 inches. Plant in Full Sun to Partial Sun at a depth of 8 inches, spacing them 4 to 6 inches apart. For Zones 3-8. A White Lily symbolizes “Virginity, Purity, Majesty, Sweetness, Chastity, and It’s heavenly to be with you”.
Lobelia ‘Laguna White’ is a low maintenance plant, known for their Heat Tolerance and Cold Tolerance. Mature Height is 8 to 10 inches. Mature Spread is 6 to 10 inches. Plant in the Full Sun to Partial Sun. For Zones 3-11. Can become a perennial in Zones 9-11.
Mockorange ‘Bouquet Blanc’ is very fragrant with orange-scented double white flower clusters. Deciduous small shrub blooming late Spring or early Summer. Remove the oldest branches (back to ground) right after plant has finished flowering. Mature Height is 5 to 7 feet. Mature Spread is 3 to 4 feet. Plant in the Full Sun. Has a yellow Fall color. For Zones 4-8.
The Monk’s Cap ‘Grandiflora Alba’ has beautiful clusters of white flower spikes with violet at the tips that look like a Monk’s hood. This plant wants persistently moist well-draining soil in a sunny location or very slightly shaded; it will not bloom well in much shade. Mature Height is 36 to 48 inches. Plant in Full Sun at a depth of 1 to 2 inches, spacing them 18 inches apart. For Zones 3-8.
Oxalis – Shamrock – Charmed – Wine
Oxalis – Shamrock – ‘Charmed Wine’ has dainty white flowers blushed with a maroon hue that looks like a wine stain on white fabric when wet; and velvety violet wine-colored shamrock shaped leaves. Mature Height is 12 to 16 inches. Mature Spread is 12 to 14 inches. Plant in Full Shade to Partial Shade. For Zones 3-11. Can become a perennial in Zones 9-11. The Shamrock is symbolized as “Lightheartedness”.