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Some more pictures of the acanthus spinosus under uv light. Here are some tips for growing Acanthus spinosus:SoilAcanthus spinosus can tolerate a wide range of soils as long as they're well-drained and not wet. It prefers rich, fertile soil with lots of organic matter, so you can amend the soil with compost before planting. Avoid planting in areas with standing water.LightAcanthus spinosus can grow in full sun to part shade, but it flowers best and is more compact in full sun. In hot climates, it may appreciate some afternoon shade.WaterAcanthus spinosus needs frequent watering and will wilt if it dries out.TemperatureAcanthus spinosus can survive winter temperatures as low as USDA Zone 5, but you can provide winter mulch for extra protection.PropagationYou can propagate Acanthus spinosus by taking root cuttings in early spring. The plant can also spread aggressively by creeping rootstocks, especially in loose soils. If the plant is spreading, you can cut growth away from the crown to weaken it, then smother it with cardboard, weed membranes, or black plastic.MaintenanceAfter the plant has finished blooming, you can remove the flower stalk. If large, crowded plants develop mildew due to lack of air circulation, you can cut them down and the leaves will re-sprout.