What is the main difference between newer hybrids and older, heirloom cultivars regarding maintenance?

Answer

Older cultivars tend to multiply readily under neglect, while newer ones might require richer soil or regular division.

Older, heirloom cultivars are often genetically programmed to multiply easily with minimal human intervention, whereas some newer, highly bred hybrids may demand richer soil or more frequent division to maintain vigor.

What is the main difference between newer hybrids and older, heirloom cultivars regarding maintenance?
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