Fertilizers For Berries
There are plenty of different fertilizers for berries and other home and garden plants. Knowing which is good for what plant and why, is very important to every gardener or florist.
Examples given here are just that - examples. Content of nutrients in fertilizers from different companies vary, sometimes significantly. That is one of the reason why should every gardener know what is in the fertilizer and for what plant he/she will use it.
Content of mineral fertilizers vary - they have their content in nitrogen (N), phosphorous (P) and potassium (K) clearly printed on container or bag. Often they have different compounds with elements such as iron (Fe), magnesium (Mg), sulfur (S), boron (B) etc.
Here are some examples of fertilizers that I use for berries and other plants:
Granulated fertilizer for berries
It is complex mineral fertilizer with NPK content of 8-15-15+B, Cu, Fe, Mn and Zn. This is fertilizer rich in micro elements needed by the berries. One tablespoon has around 10g of fertilizer. June-bearing strawberries need around 30g/m2 before flowering, 60g/m2 after harvest and 30g/m2 in September. Other strawberry varieties need around 15-20g/m2 every month, depending on the soil quality, number of plants per square meter etc.
Other berries (blackberries, blueberries ...) need around 15-20g/m2 in spring and every month during the vegetation period. It is better to add less fertilizer but more often to avoid any danger of over-fertilizing the soil.
Granulated fertilizer for strawberries
It is complex mineral fertilizer with NPK content of 13-5-20+0.5% Fe. One tablespoon has around 10g of fertilizer. For June-bearing strawberries, it is recommended to add 20g/m2 before flowering, 40g/m2 after harvest and 20g/m2 in September. Other strawberry varieties need around 10-15g/m2 every month, depending on many things. This fertilizer is also used for other berries – 20-30g/m2 or 5-10g per plant (depending on the size of the plant) in spring and once a month until the end of vegetation.
Coated granulated fertilizer for berries
It is complex mineral fertilizer with NPK content of 11-11-19+2% Mg. One soup spoon has around 15g of fertilizer. This is a little bit expensive fertilizer, but granules have envelope/membrane that allows fertilizer to be gradually dissolved in soil and used by the plants. This fertilizer can be used every four months, without danger of overfeeding the plants or causing any damage to the roots. Dosing for strawberries is around 15g/m2 before flowering and 40g/m2 after harvest. Other berries require 20-25g/m2 in spring and every 2-4 months until the end of vegetation, depending on the size of plants, soil and the growth of plants in general.
Granulated fertilizer for roses
It is complex mineral fertilizer with NPK content of 8-16-20+0.1% Fe. Complete and well balanced, it is used for any type of rose plant. One coffee spoon has around 5g and one tablesspon around 10g of fertilizer. Recommended dosages are ~15g for 20-25cm diameter pots and ~20g for 30-40cm diameter pots every 45 days. For plants on open terrain, 30-40g/m2 or 20 to 60g per plant, depending on the size of the plant.
Although this is not strictly speaking fertilizer for berries, it is suitable for many plants, berries included. One of the reasons I like this fertilizer is that it is not very rich in nitrogen - plants will NOT grow out of control and abundance of phosphorus and potassium will promote flowering and growth of healthy fruits. Of course, always be sure not to add too much of these fertilizers since they can cause damage to the plants.
Chicken and cow/horse fertilizer
It is organic fertilizer in the form of briquettes. NPK content varies, but it is very strong fertilizer rich with micro elements and organic material. If it comes in direct contact with roots, roots can be damaged. It is best used in late winter and early spring while plants are dormant or garden patch is without plants.
It is not necessary to add this type of fertilizer as often as mineral fertilizer to the soil, since organic matter decomposes during time to compounds that plants can use. Also, this type of fertilizer is not odorless, in fact, sometimes it can smell rather awfully - be sure to dig it into the soil.