Gardeners have found success combining narcissus and dahlias in what is described as a "bulb lasagne" planting technique, allowing for continuous floral display from early spring through late autumn. This layered approach, developed over the past two decades, involves planting narcissus bulbs deep in the soil during autumn and overlaying dahlia tubers closer to the surface, either in autumn or spring depending on local climate conditions.

The deepest layer consists of a selection of narcissus varieties chosen for their multi-headed flowers, extended blooming periods, and strong scents. Early bloomers such as Narcissus ‘Avalanche’ and ‘Avance’ begin flowering in January, followed by N ‘Cragford’, ‘Polar Hunter’, ‘Trevithian’, and the classic scented varieties Narcissus ‘Actaea’ and poetilus ‘Recurvus’, which can continue into May. These bulbs have demonstrated longevity in gardens, with some plants persisting for decades. Gardeners are advised to avoid "candle daffs" that produce only single-headed flowers with short blooming seasons.

Once the narcissus have finished blooming, dahlias take center stage from mid-June until the first hard frost. Notable performers include ‘Tom’s Choice’, Dahlia ‘Sissinghurst’, ‘Red Starfish’, and ‘Pink Starfish’, as well as the early bloomer ‘Strawberry Cream’ and others like ‘Totally Tangerine’ and ‘Sarah Raven’. These dahlia varieties maintain good foliage and flower production even under heat stress.

To maintain plant health, especially under warmer conditions that encourage fungal diseases such as mildew, gardeners are recommended to remove lower leaves from dahlias by August to improve air circulation. Additionally, managing the narcissus foliage requires a delicate balance: although it is important to keep the foliage until it browns naturally to support next year’s flowering, the dense growth can harbor slugs and snails that damage emerging dahlias. A suggested practice is cutting back the bulb foliage in rings around known dahlia tubers to protect the new shoots, then spreading out mulch to expose slug eggs for bird predation.

The planting beds are mulched with compost to protect tubers through winter, and a physical barrier—constructed as a grid of spiny branches from rose, holly, or bramble—is recommended to deter squirrels from disturbing the bulbs.

This strategy of successive flowering layers provides a sustained and vibrant garden display with relatively small spatial requirements, combining the appeal of early spring narcissus blooms with the summer and autumn vibrancy of dahlias. Gardeners are encouraged to tailor the planting depth and timing of each layer according to their local environmental conditions to optimize results.