Site Selection and soil preparation for perennials
Consider the site before selecting your plants. Although many perennials, such as ferns, tolerate heavy shade, most perennial plants require abundant sunshine. Air circulation is important for avoiding diseases; stagnant, warm, and humid air creates ideal conditions for diseases. Perennial plants also require properly prepared soil, and a few have specific drainage and fertility requirements.
Soil preparation for perennials is similar to soil preparation for annuals. However, you should devote some special attention to perennial bed preparation, because plants may occupy the site for several years with little opportunity to correct any problems. When possible, add sand and organic matter such as bark, peat, or compost to soils well ahead of planting time.
A layer of organic matter 3 or 4 inches deep, worked into the soil a shovel's depth, is usually adequate. Since different types of organic matter work and decompose at different rates in the soil, it is best to use a little of two or three kinds of organic matter than a lot of just one.
Soil testing provides specific recommendations for fertilizer and lime needs. Since lime lasts for several years depending on the type used, never add lime without a soil test. Many fertilizers, such as phosphorus, are best applied and mixed into soils before planting. Perennials need a balance of several nutrients, including nitrogen, phosphorous, and potash; most garden supply stores carry a wide variety of fertilizer mixes. Keep in mind that phosphorus, including that found in bone meal, lasts for several years and need not be applied regularly.
Earlier this year, I wrote about an outstanding landscape plant, the Rose of Sharon. The ones I was growing in my landscape included some of the newer selections: Orchid Satin, Pollypetite and Purple Pillar. Since then, I added White Pillar to my collection.
While visiting my parents in Tennessee this weekend, my dad asked why one of their Annabelle hydrangeas was blooming while another -- growing just 5 feet away -- was not. He asked if I had some special fertilizer or bloom juice that could be applied.
I didn't, because the shrubs didn't need any special fertilizer help. It all had to with light.
How have we already turned the corner into August? While it’s still hot and likely to continue that way for at least another six weeks, I’m looking forward to one of my late-summer landscape favorites, the ornamental pepper.
These plants have been growing patiently all summer, seeming to wait patiently and soak up the Mississippi heat until our other plants need a breather. If you follow Southern Gardening, then you probably know that I really love the show that ornamental peppers put on in late summer and early fall.
The last few weeks have been hot and humid, and many of my gardening friends are ready for fall's cooler temperatures.