Rubiaceae (Houstonia)

Protocol Information for:

Label_title:
Houstonia (caerulea)

Family Names:

Family Scientific Name:
Rubiaceae

Family Common Name:
Madder family

Scientific Names:

Genus:
Houstonia

Species:
caerulea

Scientific Classification:

Scientific SubSpecies:

Species Authority:
L.

Scientific SubAuthority:

Authors:

Alessandro Chiari

Common Synonym:

Genus:

Species:

Synonym Classification:

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Species Authority:

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Other Information:

Common Name:
Azure bluet

Species Code:
HOCA4

Ecotype:

General Distribution:
Fields, open woods

Known Invasiveness:

Propagation Goal:
plants

Propagation Method:
seed

Product Type:
Container (plug)

Stock Type:

Grow Time:
0

Target Specifications:

Propagation Collection:

Propagation Processing/Propagule Characteristics:

Pre-Planting Propagule Treatments:
Seeds need 4 months of cold, moist stratification. Fill germination trays with fine germination mix and sow the small seeds on the surface. Place the trays in a cold room or cold frame. Keep the medium moist

Growing Area Preparation / Annual Practices for Perennial Crops:

Establishment Phase:
Move the germination trays in warm greenhouse (65F night, 75F day temperatures). Seeds will germinate in 3 weeks. Seedlings can be repotted in plugs or quarter gallon containers filled with growing mix made with 1 part sand 4 parts of a commercial potting mix containing 40-50% of composted pine bark. Seedlings will form a compact rosette and flower about 10 weeks after germination

Length of Establishment Phase:

Active Growth Phase:

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Hardening Phase:

Length of Hardening Phase:

Harvesting, Storage and Shipping:

Length of Storage:

Guidelines for Outplanting / Performance on Typical Sites:

Other Comments:

References:
Magee, D.W. and Ahles, H.E. 1999. Flora of the Northeast: a manual of vascular flora of New England and adjacent New York. The University of Massachusetts Press.

Citation:
Chiari, Alessandro. 2004. Propagation protocol for production of Container (plug) Houstonia caerulea L. plants Cougar Springs Ranch Brooklyn, New York. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/30). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.

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