Posso darti una lista di piante per produzione di nettare pro capite, ma se si tratta solo del tuo giardino l'effetto totale del tuo aiuto è trascurabile forse potresti aiutarle di più dando loro una fonte d'acqua.

In ogni caso la pianta che produce più nettare è l'albero coreano Bee-bee.

To help bees and other pollinators, Penn State University recommends that you Plant a pollinator garden.
To help bees, butterflies and other pollinators visiting your backyard, you can plant a pollinator garden! Pollinator gardens provide a safe haven for pollinators as well as a beautiful garden that you can enjoy. Some of the features of pollinator gardens include: 1) native floral resources that bloom throughout the growing season so that there is always nectar and pollen available to pollinators, 2) nesting habitat for pollinators and 3) water resources. These gardens also serve as a refuge from pesticide and other chemical exposure and provide a habitat with native plants. Gardening associations can provide guidance on the best plants and features to include in gardens for your geographic region. Some may also provide certification that your garden is pollinator friendly.

Minimize pesticide and other chemical use on your property
Pesticides, fungicides and herbicides are intended to kill pest insect, plant pathogens and weeds. Unfortunately, use of these chemicals may have unintended, negative effects on beneficial insects and plants. To reduce off-target damage, limit chemical use on your property. If you do plan to spray, make sure to follow label instructions and do not spray plants when they are in bloom since pollinators will be attracted to the flowers.

The Honey Bee Conservancy recommends that you plant at least three different types of flowers in your bee garden to ensure blooms through as many seasons as possible. This will provide bees and other pollinators with a constant source of food. For example:

• Crocus, hyacinth, borage, calendula, and wild lilac provide enticing spring blooms in a bee garden.
• Bees feast on bee balm, cosmos, echinacea, snapdragons foxglove, and hosta in the summer.
• For fall, zinnias, sedum, asters, witch hazel and goldenrod are late bloomers that will tempt foragers.

Ecowatch recommends planting the following:

1. Lavandula spp. (Lavender)

2. Rosemarinus officinalis (Rosemary)

3. Salvia spp. (Sage)

4. Echinacea spp. (Coneflower)

5. Helianthus spp. (Sunflower)

6. Cercis spp. (Redbud)

7. Nepeta spp. (Catnip)

8. Penstemon spp. (Penstemon)

9. Stachys spp. (Lamb’s ears)

10. Verbena spp. (Verbena)

11. Phacelia spp. (Bells or Phacelia)

12. Aster spp. (Aster)

13. Rudbeckia spp. (Black-eyed Susan)

14. Origanum spp. (Oregano)

15. Achilliea millefolium (Yarrow)