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Plant of the Week
Lobelia
| Scientific name | Lobelia erinus |
| Common name | Lobelia |
| Type | Annuals |
| Variety | Annual |
| USDA Zone hardiness | 1 - 8b |
| Exposure | Full sun |
| Height | Under 1' |
| Spread | Under 1' |
A low growing perennial generally grown as an annual. Grown in full sun to shade, does better in the cooler weather and often goes out of bloom when it gets hot. Look for heat tolerant cultivars. Cut back after first bloom, fertilize and water to maintain flowering in the summer.
Recent Question from Gardeners
Question
Use of Preen
Help, I used the wrong kind of Preen (Trifluralin) on an area with edibles (blueberries, huckleberries). Do I need to pull the plants out? Does it "wear off"? What about planting new edibles in the area? I last applied about 3 weeks ago and was just planning to plant an herb garden in the area.
Answer
Trifluralin the active ingredient in the preemergence herbicide Preen commonly has around a 21 day residual once applied to the soil. After 21 days the effectiveness will dramatically wear off, however in cooler climates the residual may last longer. In your situation I would give it a couple more weeks just to be sure the chemical residual has worn off but you should be good to go in no time.
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