High Water Needs Knob Celery 'Radiant' can tolerate and grow in low light and shady areas which means it prefers about 2 hours of diffused natural light. Remember, low light does not mean NO light! All plants need light to survive, some more than others. When plants like Knob Celery 'Radiant' grow in low light or shady areas, you will want to avoid exposing them to direct sunlight unless direct sun is specified as a light need for the plant. In which case it can tolerate a wide range of low light to direct sun conditions and is very forgiving! If growing outdoors, you will want to plant Knob Celery 'Radiant' in a shady area.Knob Celery 'Radiant' is a great option for shade gardens or underneath trees or near fence lines that provide cover from bright sunlight. If growing indoors, you can grow this type of plant in a lot of different areas of your house. The only thing to keep in mind is that you will want to avoid direct sunlight (unless specified) for Knob Celery 'Radiant'. This means if you are growing near a South-facing window, make sure to place it a few feet away from the window. South-facing windows receive the most amount of bright, indirect and direct light a day. Eastern-facing windows receive light in the morning and afternoon shade, while West-facing windows receive sun in the afternoon. North-facing windows receive the least amount of light and would be great candidates for where to place you Knob Celery 'Radiant'.
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Direct Sunlight (Full Sun) Knob Celery 'Radiant' thrives best in direct sunlight or full sun meaning that it loves at least 6-8 hours of bright direct light.
If growing outdoors, you will want to plant Knob Celery 'Radiant' in an area that receives sunlight throughout the day. If growing indoors, place near a South-facing window for ideal conditions. South-facing windows receive the most amount of direct light everyday.
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