Answer: There are two distinct categories of carnations: florists' and border. Florist's carnations are grown in greenhouses or outdoors in mild winter areas, where they'll grow to 4 feet high. For largest blooms, leave only the terminal bloom on each stem and pinch out all other buds down to the fifth joint, below which new flowering stems will develop. It's normal for carnations to need support as they grow. Your seedlings should become sturdier as they mature, providing they have ample light. Keep the source of artificial light about 6 inches above the tops of the plants. If you've direct sown your seeds, provide supports to the plants and they'll become stronger as they mature in the full sunshine in your garden.
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