Background:
Pillar geraniums are unique to the geranium world. Their vigorous yet branching growth makes it ideal for large containers. Support, such as a tomato cage, trellis, or other method is necessary to contain the growth in a columnar manner. This plant was designed for patio use, however a large container of Pillar geranium, partially plunged into a flower bed, would make a striking addition to any landscaped area.
Basics:
Pillar geranium should be planted in 12", 14", or larger containers. These plants are CVI® clean stock material. To ensure their full potential, plants should be grown in a sanitized environment, away from non-CVI® plant material.
Soil:
Plant in a well drained professional potting mix. pH of 5.8 - 6.3 is ideal.
Planting:
Plant 4 plants per 12" pot or 5 plants per 14" pot to create high quality finished product. Follow Oglevee irrigation guidelines to ensure proper root development. In high light/temperature conditions, the plants will benefit from frequent syringes of water to reduce stress while they become established.
Fertilizing:
Pillar geranium is an aggressive grower and responds well to a balanced fertilization program. Consider using 15-5-15, or 21-5-20 at 250ppm constant feed once plants are established.
Pinching and Timing:
One pinch should be done 2 to 3 weeks after planting. Subsequent pinches should be unnecessary. Once new shoots become long enough to support, twist tie (loosely) to the cage or trellis. One tie per foot of height is sufficient. A 36" tall plant can be grown in 12 to 16 weeks depending on the time of year. A good rule of thumb is 8" per month during the winter and 12" per month spring and summer.
Insects and Diseases:
Pillar geranium are relatively insect and disease free. Monitor for Thrip, Whitefly and Aphid and spray with any geranium labeled products. We have found no particular phyto-toxicity problems with this plant. Use good sanitation practices to reduce Botrytis infection possibilities.
Note: The single-flowered nature of Pillar geranium encourages petal drop when using smoke fumigants during flowering.