How To Fertilize And Water Juniper Plants

To grow and look their best, junipers will benefit from fertilization and water (if and when needed). A little good advice goes a long way so read on to find helpful azalea feeding and watering tips.

How To Fertilize Junipers

Junipers are typically light feeders however will benefit from an annual feeding. Fertilize juniper plants in late winter or early spring before new growth begins to flush with a slow-release shrub & tree food. Alternatively, you can feed with a natural or organic plant food, preferably one that contains iron for deep greening. Follow application instructions on the product label. 

Note: To avoid injury to tender new growth stimulated by fertilization, cease feeding junipers two months prior to the first frost date in your area.

Soil pH Is Important!

Though junipers will tolerate a neutral to slightly alkaline soil, they are acid-loving plants that grow and look their best in an acid to neutral soil ranging from 5.5 to 7.0 on the pH scale. Most average garden soils range between 6.0 to 7.0 on the pH scale.

Testing Soil pH  

Soil pH is a measurement of the alkalinity or acidity of soil and is measured on a scale of 1-14, with 7 as the neutral mark. Any measurement below 7 indicates acid soil conditions, and anything above 7 indicates alkaline. If you're unsure about the pH of your soil, and whether or not it's suitable for growing junipers, it's a good idea to test the soil pH in the planting area. 

You can quickly test soil pH with an inexpensive soil pH tester probe. To raise the pH (make more alkaline) you can add pelletized limestone to the soil. To lower the pH (make more acid) you can apply Soil Sulfur, Aluminum Sulfate, or Chelated Iron. Adding organic compost to the soil or using compost as mulch can also help to increase acidity and maintain acid soil conditions.

Mulch Is Good!

Apply a 1 to 2" layer of aged, shredded or chipped wood mulch or pine straw around the planting area to conserve moisture and to suppress weed growth. As the mulch decomposes it will add vital nutrients to the soil that your junipers will appreciate. Avoid using freshly chipped or shredded wood for mulch until it has cured in a pile for at least 6 months, a year is better. 

How To Water Junipers

Because they do not like constantly soggy or wet soil, avoid overwatering junipers or planting them in a poorly drained soil that stays constantly soggy or wet. Well-drained soil is a must!

At Planting Time

Immediately after planting your junipers deep soak the soil in the planting area, including the rootball, to a depth equal to the height of the root ball. For an extra boost, to stimulate early root formation and stronger root development you can water you newly planted Encore Azaleas with a solution of Root Stimulator, which reduces transplant shock and promotes greener, more vigorous plants. When planted during the winter dormant season plants will require less water. So, be extra careful not to overwater during winter!

During the First Growing Season

In average garden soil you should not have to water your newly planted junipers every day. More often than not, this causes soggy soil conditions that can lead to root rot and other harmful plant diseases. In the absence of sufficient rainfall, water only as needed to keep the rootball and surrounding soil damp to moist. Keep in mind that deep soaking less frequently is much better than splashing just a little water on the plants every day. When planted during the winter dormant season, when plants are not growing and moisture is not evaporating from the soil as quickly, your plants will require much less water. 


When established, junipers are exceptionally drought tolerant plants rarely if ever requiring supplemental irrigation. If during prolonged drought you see foliage color fading or foliage wilting this could be an indicator that your plants need a good deep soaking.

Note: When watering with an automated irrigation system it's best to set your timer to water during the early morning hours and not in the late evening or at night, which can lead to the onset of fungus and other foliage diseases. During the first few weeks after planting, check soil moisture often and adjust irrigation time if necessary to keep the soil moist, not wet. 

How To Water Junipers In Containers

Junipers growing in containers will require closer attention to soil moisture. Use the finger test to check soil moisture regularly and only provide water if the top inch or two of the soil is somewhat dry to dry. During cooler months plants will not require nearly as much water.

Plant Long & Prosper!

Questions? Contact Us!