Crowded bulbs are less likely to produce a high quantity and quality flowers.
When flower number and size starts to diminish, consider separating the bulbs and replant. Bulbs planted at recommended depths initially require less dividing and resetting. Spring flowering bulbs such as daffodils, tulips and hyacinthsshould be divided in September or October. Granted, it is difficult to determine the location of the bulbs without staking or mapping them out previously. Care should be taken when digging to prevent damage to bulbs.