Van Dycks

Varieties

Platycodon grandiflorus

(Balloon Flower) Plant in moist, well-drained soil in full sun to partial shade. Space 12" apart. Slow to start growing in the spring. Be sure to mark its location so you do not accidentally dig it up during spring cleanup. Grows 24-36" tall. Blooms late spring to early fall. Hardy in zones 3-9.

Polemonium caerulum

(Jacoba

Polygonatum

(Solomon's Seal) Plant in moist, humus-rich, woodland-type soil in partial to full shade. Space 12-24" apart. Blooms May-June. Hardy in zones 4-9.

Polygonum

Plant in moist, fertile soil in full sun to partial shade. Grow in full sun only in areas with cool summers. Space 24" apart. Keep well watered to encourage long period of flowering. Grows 36-48" tall. Blooms July-October. Hardy in zones 5-9.

Pontaderia

(Pickerel Rush) An ideal plant for planting on the edge of ponds or to be submerged into a pond, but not deeper than 8". Plant in plastic or earthenware container in heavy top soil. Cover the entire plant with growing medium unless green growth is showing. Any growth should be exposed to the air. Water thoroughly after planting. Let plant grow to about 4" tall before submerging the pot into the pond. These plants can also be planted directly into the ground as long as there is an abundance of moisture. In cold areas, plants should be protected from frost by applying a layer of straw or leaves. Hardy in zones 3-11.

Poppy

See Papaver Orientale

Potentilla

(Cinquefoil) Plant in lean soil in full sun. Tolerant of wide range of soils, it thrives in dry, infertile soil. Rich soil results in unwanted, soft, leafy growth. Space 12a

Prairie Mallow

See Sidalcea

Primula

(Primrose) Plant in rich, moisture-retentive soil in part to full shade. It is intolerant of hot, dry summers. Space 12" apart. Mulch in summer to keep soil cool and conserve moisture. Grows 6-10" tall. Blooms April-May. Hardy in zones 5-8.

Pulmonaria

(Bethlehem Sage, Jerusalem Sage, Lungwort) Plant in cool, moist soil in partial to full shade. Grows well under deciduous trees. Intolerant of full sun. Space 18" apart. Grows 9-24" tall. Flowers throughout the spring, depending on variety. Hardy in zones 3-8.