Blueberries very easy edible plants. Blueberries are great for your brain. Did I mention easy? Once your plants are established, the trick to growing blueberries is proper pruning. We want to encourage new growth and to do that, we have to remove some of the old growth. This is a great thing to do together on a garden coach appointment. Do mulch around your plant periodically with coffee grounds to increase acidity in the soil (any time of year works for this – you could do it up to ten times per year! ) Don’t use peat moss even if other experts say to do it.