Phlox Planting & Growing Guide
Planting Guide Information
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Plant Eyes 1" below soil; Crown near soil line.
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18" Apart
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Spring
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A native plant that offers sweet nectar for all kinds of pollinators and a sweet scent for gardeners.
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Moderate
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Summer
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Full to Partial Sun
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Zones 4-8
Additional Growing Information
Where to Plant
While Phlox plants are relatively easy to grow, plenty of sunlight and well-drained soil are key to their happiness. If you notice puddles of water 5–6 hours after a hard rain, scout out another site or amend the soil with organic material to raise the level 2–3 inches. Phlox fancies a spot with full sun to partial shade, but in areas where the sun is very strong, they may need a little extra shade.
When to Plant
Bare root Phlox should be planted immediately upon receiving, in the spring after the danger of frost has passed. Those gardening in warmer climates can also plant Phlox in the fall. After planting, you can expect top growth to form in a few weeks, depending on the soil and air temperatures.
How to Plant
- For outdoor landscape planting, find a spot where the soil drains well, and your Phlox will receive full sun to light shade. Dig holes and tuck the bare root plants into the ground with the roots pointing downwards. Fan them out a bit and situate the growing points, the site where new sprouts will emerge, at soil level. Space Volcano Phlox plants roughly 14-20" apart and other varieties, which grow larger, 24-30" apart.
- For container planting, select a vessel large enough to accommodate the mature size of your plants and fill it with well-drained, humus-rich potting soil. Ensure there are adequate drainage holes in your pots, as Phlox must never sit in waterlogged soil. Dig holes and tuck the bare root plants into the soil with the roots pointing downwards. Fan them out a bit and situate the growing points, the site where new sprouts will emerge, at soil level. Space Volcano Phlox plants roughly 14–20" apart and other varieties, which grow larger, 24–30" apart.
- Water thoroughly, soaking the soil to settle it around the bulbs without air pockets.
How to Grow
- Water periodically during the growing season if rain does not occur, bearing in mind that weekly deep waterings are better than lighter drinks every day or two. An estimate of 1" of moisture per week is a good place to start.
- Clip the stems to within 2" of the soil level in the late fall when the foliage begins to fade and wilt unless you live in an area where the weather stays warm year-round.
- Trim out the dead stems or spent flowers to keep your plants looking their best until fresh growth emerges in the spring if gardening in a warmer climate.
- Allow your plants to rest for a few months before beginning the next growing cycle.
Phlox Tips & Tricks
- Allow space for decent air circulation between your Phlox plants and their neighbors to protect against powdery mildew.
- Expect your plants to be shipped "bare root," meaning the soil has been washed from the roots while the plant is in a dormant state. Bare root plants are easy to handle and quick to settle into the soil, but should be planted as soon as possible upon receipt.
- Amend the soil with compost, finely ground bark, or decomposed manure to improve the drainage as needed.
- Feel free to snip stems for bouquets while in bloom, as doing so will not hurt the plants, and Phlox flowers are exceptional for arrangements. Plus, for some varieties, snipping blossoms elongates the blooming period.
- Avoid overhead watering or watering at night, which can promote conditions conducive to mildew. Drip irrigation or soaker hoses are the best watering methods.
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