We have been gardening with this great plant for 12 years now and it always is a hit with hummers in our yard. It's easy to grow, indestructible, etc., and its only downfall are those darn Japanese Beetles loving it so much.
Anyhow, this season our Cuphea DV plants are doing great, growing like crazy, and blooming in the same locations as any other year (I am a strong believer in site fidelity for plants), but NO HUMMER HAS USED THEM EVEN ONCE!! I tried doing a nectar test the other day and the nectar is definitely there. We have had a great hummer season with hummers in our yard just about every day since late April, but still no Cuphea DV use. Other years, hummers are all over the plants just as soon as they are blooming, even as early as late May, but not this year. We've used the same potting mix, pots, etc. and our overwintered plants are not getting any use either (and, we purchased the plants from the same nursery as other years, Avant Gardens.)
It was a cold, wet spring, but all of that is definitely a thing of past now as we enjoy temperatures in the upper 80's every day and watch our lawns turn brown from lack of rain. Hummers have moved on from the feeders to Monarda 'Jacob Kline' and Catmint, but no use of Cuphea DV.
What's really dismaying is that we so strongly recommend this plant in our "Gardening for Hummingbirds" program and now it's not attracting hummingbirds.
Any thoughts or ideas would be greatly appreciated.
Kathi and Michael Rock