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  In the South West and other desert areas, occasional watering will be required, but less then most other plants
• First Step Greenhouses
• Bill Moore & Co., Inc
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Cassa Blue™ - Dianella caerulea 'DBB03' PP17,998

This "no cane" form of flax lily has stunning blue foliage that is compressed into fans for a very neat look. The spring display of cobalt blue flowers is far superior to any other Dianella.

Spring Blooms		Extreme Heat
Summer Blooms		Humidity/Excess H20
Height	1½'-2'	Evergreen USDA Zone	8-11
Width	1½'-2'	Perennial USDA Zone	7-11
Mass Planting		Full Sun
Single Specimen		Moderate Shade
Border Planting		Heavy Shade
Moderate Drought		Sandy soil
Extreme Drought		Clay Soil
Frost Tolerant		Low Maintenance
Deer Tolerant		Wet/Low Areas

 

Download photos (.zip - 10.2 MB)

General Description:

• Tight-clumping rhizomatous perennial; slow spread
• Drought and heat (120+º F) tolerant
• Evergreen in normal winters to 20º F (Zones 8-11). Hardy to Zone 7
• Medium growth rate. 2-2.5 ft. high x 1.5 ft. wide.

Position:

• Grows well in filtered to full sun; best suited for full sun
• Tolerates windy, salt laden positions, i.e. ocean front landscapes
• Sandy to clayey loam (free draining) soils; slightly acidic
• Suitable for tropic and arid climates

Planting Density:

• For one gallon pots, plant on 18 to 24 inch centers
• Three gallon pots should be planted on 30 inch centers

Plant Care:

• Do not bury the crown when planting
• Water as required to keep the plant healthy for the first 8 to 16 weeks. Once established, irrigation may only be necessary during extreme drought. Avoid overhead irrigation to reduce the possibility of leaf spot
• If trimming is required, use a sharp implement and cut to 6 in. above the ground. Avoid trimming in drought conditions, or in the middle of summer.
• Fertilize in spring and fall using a slow release fertilizer with a 3:1:3 blend ratio plus micronutrients (Iron)

Weed control:

As with all weed control, a proactive approach is usually the most effective. By increasing planting density and using pre emergent herbicides close to the time of planting, adequate control can be achieved with a minimal investment. For pre-emergent control, use Ronstar or Rout at the labeled rate. If post emergent control is needed, Fusilade can be used to selectively remove grass weeds. At this time the only known method for removing broadleaf weeds post emergence from CassaBlue is a directed spray of Glyphosate (Roundup). When spot spraying with Glyphosate, ensure drift or overspray does not accidentally contact the CassaBlue. Do not spot spray on windy days.

Disease and Insect Control:

CassaBlue is sensitive to both crown rot and fungal leaf spot. Problems are typically noted in saturated soils or areas of excessive rainfall and prolonged periods extremely high humidity. Planting CassaBlue properly (see above) will greatly reduce the occurrence of disease. Should chemical treatment become necessary, crown rot can be controlled with thiophynate-methyl, mefonoxam, and/or phosphorous acid based product(s). Leaf spot control is achieved with, a foliar application of a copper-based fungicide and/or chlorothalonyl. No significant insect problems.