BLUEBERRY PLANTS - The How, When and Where and How to Care For Them
John Pendleton has owned a nursery as long as I have known him, and after messaging him asking for his best tips on growing blueberries, I found he has sold his nursery and vineyards. He wants to enjoy his family and travel to some other parts of the world. He was kind enough to send me his way of planting blueberries and best wishes to the Sweden growers that I asked this information for.
Blueberries like soil that is acidic, and the ph range for soil should be between 4.7 and 5.5 although if you have very alkaline soil it may take some time to achieve a lower ph level. It is very important that you do not let it go under 4.7, the minerals and vitamins can not be easily taken up by the plants. In order to achieve this you will need to add some basic elements to your ground or soil mix. You can purchase the brand that John uses for his garden center, Dr. Earth Acid Lovers, Azalea, Camellia, Rhododendron & Maple Fertilizer, it is a bio product and does not contain harmful ingredients. If you do not want to purchase fertilizer to lower or maintain your ph levels, you can when planting the blueberry plants, put a kilo of coffee grounds in the bottom of the hole. This will be readily available acidiity for the plants. John uses in his orchards his own mix for maintaining his plants, he simply shreds branches, stems and green matter from pine or evergreen trees, and mulches with pineneedles and shredded pine cones.
Choose a spot that is open and gets at least six hours of sun per day. Blueberries like to have an open space around them, do not crowd them in small spaces if you are planting the larger varieties. Compact plants you can put closer together but give them room to grow and have air circulating around them.
Dig a hole at least 2x the size of the plant and to the depth where the soil is level with the plant in the container plus enough room to add a layer of acidic mulch on the top. Add water.
In the hole place at least 1 kilo of coffee grounds, make sure you mix in some leaf mold. Leaf mould can be obtained from taking decayed leaves and other organic matter in the woods, or you can just use the composted mold from under some leaves or trees. The leaf mould is very beneficial in achieving an environment that is healthy for the plant, it puts good bacteria into the soil and gives the plant a head start. If you have pine trees take the mould from under the decaying pine needles, then you have a good acidifier and beneficial mold.
Once you have planted your plants, simply cover the top with a layer of acidic mulch, (evergreen clippings chopped, pine needles, shredded pine cones, or place some of the acidic fertilizer at least one to two inches away from the base of the plant. Do not place mulch against the stem.
You will want to watch for pests and for any signs of mildew on the plants, when purchasing you can choose compact varieties that are bred to have a bit of resistance to mildew, but if you do get mildew, simply use organic milk in a spray bottle diluted 1 cup to 1/16 water and spray on the plants when the temperature is cool, (NOT in direct sun).
Types of plants to purchase.
If you are in North America you can grow most blueberry varieties as long as you maintain the acidity of the soil. It is however a good idea to check with your County extension agency to see what varieties perform the best in your particular area. They can give you a list and will even help you decide which sort is better in your garden based on size, sun, and other environmental factors.
If you are in Europe and want to grow blueberries, first decide if you have room for 8-10 foot (2-3 meter) tall plants that can extend out to five feet (1.5 meter) fully grown. If you do not, then your best choice is the midsize plants or compact plants.
Below are some of the varieties that you could choose from depending on the amount of room you want to utilize.
Liberty - Excellent choice for Europe because it can withstand normal freezing temperatures and is hardy to -30 Fahrenheit. The fruit is sweet and the color is a beautiful shade of blue. The berries come easily off the bush and shelf life is higher than other varieties..
Size: 5 x 5 (1.5 meters by 1.5 meters) fully grown (can be less if grown in containers.
Disease & Pests: The reason I recommend Liberty is because it is not plagued with many of the issues that some varieties have. I do recommend netting to keep birds away or flash tapes.
Pruning: You will not need to do major pruning, simply prune cross over branches and any that do not look healthy.
You can prune harder if you want it more compact, but you will also lose fruit production.
Liberty is self-fertile when planted with other Liberty plants, but you should also choose at least one other variety to plant with the liberty plants to increase fruit production. Blueberries like to have extended family nearby.
My other choice for Europe would be DUKE. It is a late flowering variety with excellent taste and a normal shelf life. Plant at least 2 Duke and 2 Liberty.
Below are some other varieties that are also possible to grow in Europe with typically good results. There are of course new cultivars every year that one can expand their
varieties with, but use caution when introducing new types into your orchard. Make
sure the plants are healthy and do not have insects or discolored leaves. A rule of
thumb for most small orchard growers when introducing a new variety into their
blueberry fields, is to let it grow in a container pot for several weeks with the proper nutrients, if after a few weeks the plant is growing and appears to be in order, then
you can plant it in the orchard with your other plants. It is also better to get plants from a grower than from a big box store, shipping plants is not done under ideal conditions, and can result in plants becoming diseased or stressed. My final advice is, if you don't love watching things grow and being part of the process, don't attempt blueberries., choose something that doesn't require soil acidity maintenance. Do check the ph levels of your soil before planting and throughout the growing season. You can add acidic mulch as it deteriorates, and to help retain moisture in the summer months, and to provide protection in the winter months. Also bear in mind that blueberries do not want to stand in waterlogged areas, they need the soil to be well drained and aerated.
Brigatta Blue
Calypso
Darrow
Chandler
Legacy
Elisabeth (Gread taste Medium Size, but does not have a long shelf life.
Osorno (Pollination is sometimes a problem).
Final thoughts: If you have room in a greenhouse you can experiment with some varieties that are less cold hardy, as long as you are prepared to maintain a somewhat
warmer environment for them.
(There are wild blueberry plants in Sweden that produce exceptionally well in that environment, I spoke with a grower about a year ago in Sweden that was working on a new cultivar from the wild plant. This would be something great to experiment with, perhaps creating your own hybrid cultivar, (especially if you have children, a great lesson to be learned from that project). I searched for the grower, but unfortunately I could not locate his information, although I remember the conversation well. As I prepare for my departure in cleaning up files and telephone records I will probably run across the name, I'll forward if I do).
Critical Points Summary:
PH of Soil -- Acidic
Mulch - Acidic
Fertilizer - Acidic
Water - As needed or once per week depending on the weather and temperatures
Cold Hardy -- Pick varieties that are cold hardy to your area
Soil -- Acidic with acidic leaf mold added to the soil and good drainage for water
Pruning - Most require normal pruning of cross over branches and branches not aligning with the rest of the plant.
Pollination: Plant at a minimum 2 plants of 2 different varieties for better pollination and increased fruit production.
We wish John well in his new adventures, and I hope he makes a trip to visit us with his family. Thanks for providing the great information, and for inspiring us to grow more of our own food.