If you like Alyssum which performs extremely well during the winter/early spring, but are disappointed that it quickly melts away when our heat and humidity sets in then Lobularia (Lobularia hybrida) may be the answer. Lobularia hybrida is essentially a hybrid alyssum and is starting to make a name for itself in the industry.
In our trials last summer, its performance rating was 4.69 / 5.0 when judged for flower production, uniformity of habit, resistance to insects and diseases and appearance. We evaluated the Stream Series™ from Danzinger . They were planted on June 5, 2013 in our trial garden. There was a mix of Bicolor Lilac Stream, Lavender Stream, Summer Stream, White Stream and Silver Stream. We evaluated the plants every 2 weeks starting in July. The plants were fast growing with a compact spreading habit. They were very floriferous producing a sweet fragrance that was strongest at dawn and dusk. The plants were extremely heat tolerant not missing a beat through our extremely hot and dry summer.
I will admit I was skeptical at first, but seeing is believing – Lobularia is a “tough as nails” plant for Harris County. There are several other Lobularia series on the market, if you see the Stream Series or any others try them in your garden this summer you will not be disappointed.