How to Grow Blueberries in Pots
Young blueberry plants are quite forgiving as well, they will grow well in a container for many years. Their growth characteristic is shrub like and they have a smaller space requirement for their roots.
They are definitely not like a raspberry plant and will not spread roots and underground runners far and wide in the same way.
Selecting a Plant
It’s important to choose a variety of blueberry which is bred to your climate zone and region of the continent. Your chances of success increase greatly right from the beginning if you do that. They do best in zones 3 – 8.
If your area has long cold winters you can still grow blueberries in containers but you’ll need to give them significant winter protection once the weather turns.
Container plants don’t have the same amount of soil insulation as the in-ground plants do. Protecting the roots from severe freezing is needed for them to survive the winter. A greenhouse of just about any sort will do or bringing the plant in to the garage for the winter works well.
Making use of a greenhouse in just about any design will help a lot, so if you have space then build or buy one such as this.
I recommend choosing two different varieties of blueberry. This is required for cross-pollination which helps each plant to produce a larger harvest.
Look for these characteristics when buying a young blueberry:
- Choose a plant with a few strong thick branches rather than several thin branches
- New sprouts should be visible if you are shopping in the spring
- Look for signs of damage such as broken branches or missing bark
- Avoid ones that have any major damage or look generally weak
I recommend buying the largest plant you can afford. You’ll get a larger more solidly established plant that will thrive sooner. I suggest buying a plant that is 2 – 3 years old or even older if possible.
In this case, spending a bit more money is definitely better. You’ll see a larger harvest sooner and your plant will survive and thrive much more quickly than a cheaper tiny sprout of a plant.
It’s also not a problem if you find a good plant with strong features but it’s growing crooked in the pot. All you need to do when you get home is plant it on a slant so the top of the plant becomes vertical.
The roots won’t know the difference and your plant will look tall and straight.
Types of Blueberries
- Pink Lemonade
- North Blue
- Top Hat Dwarf
- Blue Crop
- Blue Gold
- and many more
On planting day, carefully remove it from the pot you purchased it in.
You’ll see a fine network of tiny roots that are most likely going to be exactly the same size and shape as the pot. You’ll need to pull off the bottom most fine roots, but only about 1/4″. Also, massage the root ball just a little to loosen it if it’s tight.
Doing this will let the plant know that it’s no longer in a container and will stimulate new root growth.
However, too much disturbance or rough handling of the roots will likely kill the plant no matter what size it is. Blueberry plants are much more delicate than many other types of plants.
- Bury it to the same depth as it is now, leave the crown above the soil line
- Water generously after planting
- Add more soil if the level sinks down
Leave some space in the container, about 1/2″-1″ above the soil line to the edge of the container so the soil doesn’t spill out when you water.
- Make sure the crown of the plant is not buried
- Press down firmly but gently so the plant is stable in the container
- Water the plant well, soak it completely
- Two different varieties are needed for good pollination
- The Pink Lemonade variety will pollinate both the blue and pink varieties
- Slightly acidic soil with a pH of 5.5 is ideal
- Don’t disturb soil or roots once planted
- Yearly pruning of oldest branches will produce new shoots
- Feed with good quality organic fertilisers
- Plant in a light soil mixed with 50% peat moss
There are berry fertilisers which are formulated specifically for blueberry plants.
Down to Earth carries a complete line of organic fertilisers that are perfect to nourish all of your blueberry plants with the right balance of nutrients and minerals they need.
Container plants need more help getting nutrients because of the confined space, the roots cannot dig down and gain the nutrients from the soil themselves.
They have very tender roots
Once you plant your new blueberry plants don’t move them. Whether it’s planted in a container or in the ground make certain you are going to leave it alone after planting.
The blueberry plant has a small root system and doesn’t take a big footprint. The plant can live in the same container for years and years with no problem as long as you feed and fertilise it and do your best to keep it healthy.
If you want to, at planting time in the same large tub, you can also add a couple of strawberry plants around the edge. They will grow happily together and produce quite a bit of fruit from a small area. Do this only at first planting though.
Do not dig in later on to add any plants to the edge of an established potted blueberry plant. Chances are high that it will kill the blueberry.
The tiny “hair” roots of the blueberry are very sensitive. I learned this the hard way! It’s way too easy to kill a blueberry plant, even a large one with just digging in to the edge a little bit.
The hardest part about growing these delicious berries is waiting for them to ripen and become their sweetest.
Please leave a comment if you have questions about planting blueberries or tell me about your blueberry growing experiences.