These perennials don’t need a lot of water to keep their garden colorful – Orange County Register

The other day I saw two semi-dwarf oleanders bloom in all their splendor. The oleanders appear to be returning with great impetus after being plagued by decades of bacterial disease. This is a real blessing for those who want an ever-flowering hedge that never needs to be watered.

The bacterium that causes the disease, Xylella fastidiosa, is spread by a glass-winged insect, a half-inch-long leaf-hopping insect. This clam seems to have finally been suppressed by a parasitic wasp known as Cosmocomoidea wherever it had previously flourished in California. The wasp, which took 30 years to feel after being released by insect researchers, puts its eggs inside the leaf funnels. As the wasp larvae hatch, they eat the eggs. In addition to oleanders, the leaf duck, which spreads bacteria, visits grapes, peach, plum, strawberry and almond trees, as well as shady trees such as sweet gum (Liquidambar), sulphate, oak, sycamore, magnolia and jacquard.

Make sure that when spraying an insecticide on any of the fruits or shady trees in question, avoid using products that kill beneficial insects such as parasitic wasps.

In fact, the two semi-dwarf oleanders I’ve looked at recently – a Petite Pink and a Petite Salmon – have been growing for well over 20 years and have barely shown the leaf scorching symptoms of the higher traditional types; the dwarfs were either more tolerant of infectious bacteria or just less tasty for the offensive leaf duck. The oleanders almost always bloom, and when I saw them, I was reminded of other non-stop blooms. All of the plants listed below bloom from spring to frost, and some also bloom in winter.

The list of permanent flowerers is led by lantana. There are many varieties, ranging in size from tall bushes to mulch, and bush types can be kept low by pruning so they can become mulch. Once the ground is covered, whether due to natural deflection or pruning, lanthanums never need to be irrigated. The dormant varieties are purple or white; On the same flower is a semi-running red with a compact lemon and higher types with yellow and orange or yellow, salmon and orange stigmas. The Mexican purple flower (Lobelia laxiflora) is an outrageously violent ground cover that spreads rapidly. due to its rhizome-like growth and its rather colorfully hanging, tubular, widening yellow and orange flowers – it fits the orange and yellow lantana variety mentioned above. Where the soil stays wet, it covers a huge seedbed in a single season. Where water is less abundant, it survives even more limited growth. The species name laxiflora means “loose flowering” and suggests that its flowers appear wherever the plant spreads.

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