Calla
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- PLANTING and CARE of CALLA LILIES (Zantedeschia)
- Calla Lily100
- Southern Garden History Plant Lists
- O Recalcitrant
- Summer Flowering Bulbs Summer Flowering Bulbs Are Relatively Easy to Grow, and Many Grow Well on Long Island
- The Plant List the a Better Way to Beautiful
- Watering Guide and Table Moisture Meter
- Plant List (Pdf)
- Genaust, H. 1999. Calla
- Sibiu (Romania)
- A Guide to the Natural Communities of the Delaware Estuary
- Pond Basics 4
- The History of City Park
- Aquatic Plants 2021 * = New in 2021
- Endangered and Threatened Species of Illinois: Status and Distribution
- Growing Zantedeschia for Cut Flower Production
- Nitrogen and Phosphorous Removal by Ornamental and Wetland Plants
- Calla History and Culture