Category Archives: Featured

Tricyrtis formosana ‘Gates of Heaven’

Just the common name, Toad Lily, sparks curiosity and invites close inspection. The delicate blossoms of this attractive cultivar of Tricyrtis formosana resemble small orchids and have distinctive spotting on the blue-violet petals. Flowering interest begins in early August, but the golden yellow foliage adds color early in the season. Plants are stoloniferous, forming small clumps 12″ high, making it suitable for the front of a border. Small Hosta such as ‘Wogon Gold’ and Japanese Forest Grass Hakonachloa macra make excellent companions.

Grow Toad Lilies in a soil that stays uniformly moist, yet well drained. The foliage tips will brown if the soil becomes too dry, and although not lethal, will make the plants less attractive. Tricyrtis ‘Gates of Heaven’are unappetizing to deer, and are hardy through zone 5-9. 

What’s Eating My Plants? I

Tobacco Hornworm

Don’t you just hate this? One day you have a perfectly healthy plant, and the next time you look, the leaves are riddled with holes, or completely gone! Just 2 days ago, I photographed a lovely stand of Nicotiana mutabilis (Flowering Tobacco). As I walked by this morning, I was stunned by totally denuded stalks. On closer inspection, there was a 4″ Tobacco Hornworm chomping away, leaving behind a trail of excrement. Not a pretty picture now.

The Tobacco Hornworm Manduca sexta is the caterpillar of a type of Sphinx Moth or Hawk Moth. It differs from the Tomato Hornworm by having a reddish instead of a black “horn”, and you can also tell the difference by its lateral markings. The Tobacco Hornworm has seven diagonal lines, while the Tomato Hornworm has eight v-shaped markings.

The adult female Sphinx Moth deposits her translucent green eggs on the undersides of leaves of plants in the Solanacea family, especially Nicotiana (Tobacco), and take 2-4 days to hatch. During their larval stage, these Hornworms feed on the foliage, flowers and fruit. They can ingest the toxin Nicotine without ill effects, and their voracious appetites allow them to strip even large plants overnight. Their green bodies camouflage well with the plants they feed on.

Control this pest by handpicking the caterpillars. If you have too large a crop for handpicking, you can use a product like Dipel (Bacillus thuringiensis) or Monterey Garden Spray (Spinosad) on the young larvae. Be on the lookout for hornworms with little white “pills” attached. These white attachments are the eggs of the parasitic Braconid Wasp, which feed on and weaken/kill the unsuspecting hornworm. This biological control is a good example of nature keeping everything in balance.

Container Combo for Dry Shade

Begonia, Pilea and Tahitian Bridal Veil

Again, it is so much about the foliage. The angel wing leaves of Begonia ‘Sinbad’ are really a soft celadon green veined in rose, but have a silvery cast. On close inspection, the silvery effect is due to the pebbly texture formed by the tiny raised white leaf segments. Simple, sweet pink flowers dangle from the leaf axils.  For filler, the tiny white variegated foliage of little Pilea, commonly called artillery fern, creates a frothy effect beneath the bolder leaves of ‘Sinbad’ and the casual abandon of Gibasis geniculata , also known as Tahitian Bridal Veil, with its two tone green/purple foliage and white baby?s breath blossoms finish off the combination.

Culturally, use a well drained potting soil, amended with Osmocote. Begonias do not want to live in soggy soil, so monitor watering by allowing the soil to dry out a bit. This ensemble would enjoy morning or filtered light, and would be a suitable arrangement for a covered porch, where the minimal watering needs can be monitored.

Container Combinations I

Pink/Wine/Silver Combo

A classic combination for a sunny spot. We’ve combined our favorite Pelargonium sidoides with a new heat tolerant pale pink Marguerite, Argyranthemum ‘Pink Reflection’, silvery Centaurea gymnocarpa ‘Colchester White’ and Dichondra ‘Silver Falls’ and a compact selection of Gaura ‘Belize, with wine tinted foliage and wine/pink blossoms that dance on 18-24″ stems all summer.