Photo: MurielBendel · CC BY-SA 4.0
Plant Facts
Quick Answer
Blackthorn pollen is shown in this guide as a red and rust tone. It is listed as shrub, associated with spring bloom timing, USDA zone 4 - 7, and pollen and nectar forage value.
Pollen Color Notes
The visual color shown for Blackthorn is grouped broadly with red and rust pollen tones. It is intended for comparison and identification support, not as a laboratory measurement.
Pollen color is highly variable. Lighting, pollen age, moisture, collection method, cultivar, and local growing conditions can all change how pollen appears. Use this as general visual guidance, not a scientific color standard or guaranteed field match.
Bloom, Zone, and Forage Context
Blackthorn is listed for spring. The record lists USDA zone 4 - 7; hardiness zones are planning context, not a precise flowering calendar. Approximate bloom months in the supplemental notes: March, April.
Its forage type is pollen and nectar, with pollen value marked as medium and nectar value marked as low. Blackthorn may provide early forage where hedges are abundant, though cold weather can limit bee flight during bloom.
Identification Notes
Blackthorn is a thorny shrub with white flowers that often appear before leaves. Use thorny hedgerow habit and very early spring bloom timing with pollen color.
Flower color note: White. Flower color and pollen color may differ.
Related by Similar Color
Related by Season
Related by Plant Type
Related by USDA Zone
Related by Bee Forage
Sources
United States Department of Agriculture / reviewed 2026-07-12
USDA hardiness zone context USDA PLANTS Database
United States Department of Agriculture / reviewed 2026-07-12
scientific name, common name, distribution context, plant classification Missouri Botanical Garden Plant Finder
Missouri Botanical Garden / reviewed 2026-07-12
plant identification, flowering context, garden plant descriptions Wikipedia and Wikimedia Commons
Wikimedia Foundation contributors / reviewed 2026-07-12
plant image, image credit link