Q: I live in New Hampshire. will the desert rose plants, adeniums, grow in my area?
A: Yes we have clients in Maine, NY, MN, ND, Washington State, etc. However, you need to grow them in containers, use the right soil and fertilizers. In the northern states many collectors have greenhouses or a window sun room so you can extend the growing season due your longer winters. The adenium plants, desert rose plants, does not like weather below 40 degrees what so ever. If you do not have a green house or large south facing window to extend your growing season you may want to get a growing light. Do you have to have longer growing season and light to grow them – No. However, they will grow much slower and may not flower in the Spring/early summer as easily. You will need to use fertilizer to help them grow and bloom.
During the winter water them once a month. Use time released 6-6-6 or 6-6-10 fertilizer during the summer months and in the Winter. Use Dyna-Bloom and Dyna-Grow Tekt starting in late winter (March in your area) for two months every other week or until you see flower buds just starting to form.
The grow light or large south facing window is more critical during the late winter early spring in your area. You need to get the adenium plants to warm up (60 to 70 degrees) with longer hours of daylight start to grow to get flower in late Spring/Early summer.
Adenium plants do go dormant and if the plants does not get enough light (6 hours) and warmth starting in late winter (March) to get out of dormancy you may have a hard time getting the desert rose plants to bloom. In England desert plants such as adeniums are very popular, however, they have green houses or growing windows. Their weather the Northern New England states in the USA so if they can grow the desert rose plant and other succulents so can you.