Crop Culture Report: Euphorbia
Recommended Containers: 4” to 7” pots and combination containers.
Consumer Uses: Mixed patio containers, window boxes and landscape plantings
Crop planning from cell packs:
Pot size: Plants per pot (pp) Crop Time (weeks)
4” pot (10cm) 1 pp 5 to 7
6” pot (15cm) 1 pp 7 to 10
7” pot (15cm) 3 pp 5 to 7
10 – 12” pot (25 – 30 cm) 3–4 pp 9 to 11
Temperature Requirement: 65° to 77°F (18° to 24° C) initially are best to start growing / rooting process.
50° to 60° F (15.5° to 18° C) nights are ideal for finishing
Media and pH Requirement:
Keep soil evenly moist for optimal growth and plant quality. Overwatering, especially during cool, low light conditions will cause root issues drastically slowing growth. Oxygen deprived soil as a result of overwatering may cause yellowing of foliage similar to Iron (Fe) or Manganese (Mn) deficiency symptoms. Maintain pH at 5.7 to 6.2 to prevent inter-vein chlorosis which may occur due to minor elements being limited in availability due to higher pH. Foliar applications of Iron and/or Manganese (Fe & Mn) in a chelated form will overcome a lack of Iron / Manganese due to soil conditions.
Fertilizer Requirements: Use a balanced feed at 150 to 200 -PPM Nitrogen. Clear water irrigation may be necessary to maintain lower salt levels for controlled growth and maximum flower production. Fertilizer stock may require additional Iron (Fe) to maintain proper color of leaves.
Pinching Requirement: Crystal White Euphorbia is self-branching yet a soft pinch at transplant will help create higher quality finished plant.
Disease and Insect Pests: Aphids, Mites and Whitefly
Pythium and Phytophthora: Pythium-root damage will cause a reduction in growth, cause yellowing of foliage. Keep soil evenly moist and drench with preventative root rot fungicide regularly.
Comments: Can be used as container crop and Zone 5 perennial
Growth Regulators: B-9 (5,000 ppm) or Cycocel (1,000 ppm). Do not use Florel as PGR or to remove flowers.
Lighting Requirement: 5,000 to 9,000 ft candles. Crystal White performs best in full to part sun exposure.