
- Overwatering or Underwatering
- Too Much Nitrogen in Fertilizer
- Inadequate Sunlight
- Too Cold to Grow
- Forgetting to Deadhead
- Damaged or Rotten Tubers
- Not Dividing Tubers Correctly
Mary Ellen Ellis has been gardening for over 20 years. With degrees in Chemistry and Biology, Mary Ellen’s specialties are flowers, native plants, and herbs.
- Amy Draiss Digital Community Manager

- Can a Bougainvillea Stay Outside in Winter?
- Is Winterizing Necessary?
- Bougainvillea Winter Care
- What to Do in Spring
- FAQ
Teo Spengler is a master gardener and a docent at the San Francisco Botanical Garden, where she hosts public tours. She has studied horticulture and written about nature, trees, plants, and gardening for more than two decades, following a career as an attorney and legal writer. Her extended family includes some 30 houseplants and hundreds of outdoor plants, including 250 trees, which are her main passion. Spengler currently splits her life between San Francisco and the French Basque Country, though she was raised in Alaska, giving her experience of gardening in a range of climates.

- What Dahlias Need in Fall
- Why Not Leave Tubers in Ground?
- When it’s Safe to Leave Tubers
- When it’s Better to Lift
- What to Remember if You Lift
Mary Ellen Ellis has been gardening for over 20 years. With degrees in Chemistry and Biology, Mary Ellen’s specialties are flowers, native plants, and herbs.
- Amy Draiss Digital Community Manager