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Luminary Backlight Phlox

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Pre-Order for Spring of 2022 - Learn More


The LUMINARY™ 'Backlight' Phlox paniculata or tall garden Phlox adds height and beauty to any landscape. This stunner tops out at 28 to 30 inches tall and boasts pure white flowers that grow in well-defined panicles or clusters. The fragrant flowers bloom in mid to late summer and sit on top of tall stems dotted with dark green foliage. This plant is a perennial in USDA growing zones 3 through 8.

This upright plant is commonly used as a thriller in containers, and it can also grow in borders, landscapes, and mass plantings. The pure white flowers provide a nice contrast when planted near other blooming plants, and the striking blooms make excellent cut flowers. The Phlox paniculata is native to North America, so it does not require much care once it settles in. This variety is disease-resistant for added convenience and peace of mind.

Luminary Backlight Phlox Care

Phlox thrive with plenty of direct sunlight. This plant can live in part to full sun, so it needs at least 4 to 6 hours of daylight, but the more, the better. Soil should be acidic or neutral and well-draining. Phlox prefers consistently damp conditions, so water then the top layer starts to dry out and spread mulch around the base to retain moisture. Regular fertilization will promote new growth and blooms.

Most varieties of Phlox are prone to powdery mildew, and while LUMINARY™ 'Backlight' Phlox paniculata is disease-resistant, it is still best to take steps to avoid mildew and fungal infections. Space Phlox when planting and thin them out if they become too thick. Also, water the ground and not the foliage. In preparation for winter, cut the plant back once the flowers fade. If you want the plant to reseed, wait until the fall to trim the plant back. Cover new plants with mulch for the first 2 winters to help protect the roots from chilly temperatures in cold regions.

Luminary Backlight Phlox Spacing

Tall garden Phlox grow 28 to 30 inches tall, so plant them in an area where the flowers will be on display, but the tall stems will not block smaller plants. Space plants 20 to 24 inches apart when planting. With time the plants will fill in, and giving them space allows for improved air circulation.

Click here for more information on plant container sizes.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location

Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.

1 Review - Luminary Backlight Phlox Show Reviews

  • 5
    fragrant flower that attracts butterflies

    Posted by Emma Lopez on Jan 4th 2022

    It has such great fragrant flowers and the colors are so pretty. I love how it attracts butterflies to my garden!