It is amazing to find out that raspberries, blackberries, strawberries etc. are not actually berries from a botanical point of view - they are aggregate fruits. In botanical terms, it is tomatoes, cucumbers, melons and bananas which can be correctly called berries. And the largest berry in the world is really heavy: It's the pumpkin!
So you see, berries are actually very interesting fruits. However, this GARDENA Newsletter Special, which our garden experts have ensured contains all sorts of useful information, is about berries as gardeners understand them.
News from the berry garden
Generally, it has been a productive summer in terms of berries. Blackcurrants have faltered locally on account of the long winter because their early flowering time this year was not always ideal for adequate fertilisation. The changeable weather has clearly done redcurrant fruit good in particular: Sufficient warmth ensured good growth and the abundant and, above all, consistent water supply allowed the fruit to become plump and round. Huge fluctuations in ground moisture, caused by dry periods with subsequent abundant rainfall, could have allowed gooseberries, for example, to burst easily instead. In short: When you take a walk around your berry garden a few things might stand out:
It has been proven once again with gooseberries that the choice of variety is very important, since gooseberry mildew finds good growth conditions in warm and humid changeable weather. The green fruit variety 'Invicta' in particular proved as before that it is by far the most 'invincible' as far as this meddlesome fungus is concerned. As a yellow fruit variety, 'Hinnonmäki' is worth recommending; for red fruits, 'Rokula' or 'Red Eva' are good. Rokula is good for people who aren't able to take a look at their fruit garden every day, because the fruit can be left on the stalk for a really long time and doesn't have to be picked at a very specific point in time. And for gooseberry fans who like an easy life, what about the 'Pax' variety, which is great because it is virtually spine-free and easy to pick. It doesn't have many thorns at all.
Garden designers have now rediscovered the ornamental value of gooseberries. As standard fruit trees lining paths they can help divide up garden areas or give visually interesting synchronicity to garden pathways. During the period when the fruit crop is ready for picking, they are a feast for the eyes. An important note for tree-form plants: Keep the branches short and the crowns loosened up and compact so that they won't break under the weight of the fruit. Supports for the crowns don't look very attractive in the garden. This also applies to gooseberry plants which are kept in tubs. Beauty, however, so often has its price: Gooseberry bushes are more productive than gooseberry plants in terms of crop.
What you should do now: If you have not yet pruned your gooseberries after the harvest, you should do this as a matter of urgency. A sufficiently thinned-out gooseberry bush should allow you to reach inside it without pricking yourself. Then plenty of light can get to the plant so that the fruit can ripen well.
The same applies to currants. Although they are not susceptible to mildew, problems with rust fungus can occur or - depending on the variety - there can be a tendency towards trickling of the berries. Keep an eye on this when you buy them from your local nursery or garden centre! Note the long harvesting time for currants, which - if you choose varieties cleverly - can last from the beginning of July to the middle of August. Six weeks munching potential, then freeze the rest or make it into jam.
'Red Lake', a red variety, ripens early and is not prone to setting failure; 'Rovada' ripens very late and produces high-quality large fruit on long stems. 'Primus' is currently the most important white variety. If you would like to try a pink variety, then look for 'Rosalinn'. Children love currants because they are relatively sweet when ripe. As for flavour: Blackcurrants are often considered to be too bitter to eat raw. But try 'Ometa' or the milder 'Bona' variety. This has a fine cassis aroma for use in cooking.
What you should do now: Blackcurrants should be pruned now if you haven't done so already. As with gooseberries and the hybrid cross of blackcurrants and gooseberries, the jostaberry, remove older, thick shoots which are too compact. They are generally dark brown or black in colour and therefore easy to identify. The light, young shoots on the bush should be encouraged, though, because they carry the weight of the fruit best. However, remove all weak ones and those which are not as thick as a pencil.
Did you know that raspberries don't come just in red varieties, but in yellow and even black ones too? 'Golden Bliss' has yellow fruit and 'Black Prince' (American wild variety) has black fruit. If you plant all three in your garden, you can fill your very own pies with them on the 3rd of October...
Varieties of raspberry which don't need to be trained laboriously on canes are popular at the moment in gardens where 'things need to happen quickly' You can leave varieties such as 'Autumn Bliss' to grow like currants or gooseberries as a simple bush and then scythe the bush down completely after the harvest. This form of bush doesn't produce fruit until the autumn, but this has the advantage that it is hardly ever infested by the raspberry beetle and is therefore 'worm-free'. With raspberries, too, there is always something going on: A more recent late variety, which ripens well into September and has a fantastic aroma and extremely attractive, firm fruit which keep well, is 'Polka'.
What you should do now: Cut off the truncated raspberry shoots close to the ground immediately after the harvest, leaving no stumps. This will reduce the risk of your raspberries being infested by cane blight, a infection which enters plants through old branches.
Strawberries need a chapter to themselves. Varieties with the distinctive smell of wild strawberries are the most captivating. Old varieties like 'Mieze Schindler' are worth mentioning here, but aroma-intensive new breeds like 'Thuchief' are just as good. Varieties for solid strawberry beds, such as 'Florika', are great in this respect, too, since they are cross-bred with wild strawberries. Strawberry beds are a good ground-covering planting alternative for beds in partial shade. They are not, as is required with garden strawberries, replaced after two years, but can stay in the beds for between six and eight years. Solid strawberry beds flower and produce fruit via their leaves, which is why their fruit does not lie on the ground and cannot rot so quickly.
However, there are new strawberry varieties for tubs and boxes as well as for beds: Hanging strawberries are well-suited to hanging baskets. You can put three plants in one hanging basket. In boxes, however, keep the plants 20-25 cm apart. Receptacles with a water reservoir are best for providing the plants with a consistent supply of water. Fertilise with all-nutrient fertiliser or berry fertiliser, which contain more potash than window box flower fertiliser. The berries need this so that the fruit ripens better and has more aroma.
Lastly, the hanging principle also works in the opposite direction: You can vegetate smaller pieces of trellis work or stakes with climbing strawberries. You will have to tie the strawberries up as they will not climb by themselves. Climbing strawberries can be picked from June to September and hanging strawberries can be harvested until October.
What you should do now: If your strawberries have been in their position for two years and are now looking shabby, you need to replace them. Now is the time to do this. If you don't plant them until the spring, the crop will be smaller the first year after planting. Ever-bearing varieties of strawberry and summer-fruiting strawberries can be planted equally well in spring since even then they will produce sufficiently good fruit crops.
Blue honeysuckle berries:
Blue honeysuckle berries are new to the range of garden berries and produce their fruit in May ahead of other berries. The fruits are long and thin and have the same colour and texture as blueberries. Blue honeysuckle berries are also reminiscent of Blueberries in terms of their taste. These newbies have their appeal not only because they can be picked earlier but also because the fruit is sweet and rich in Vitamin C. You need to assume a height of one to one and half metres and a width of one metre for a fully grown blue honeysuckle berry bush. Any garden soil which is rich in nutrients will suit this plant. It is easy to look after because it only has to be pruned a little and is otherwise fast-growing and uncomplicated. Due to improved fertilisation, it is best to always plant two or more varieties of the blue honeysuckle berry which flowers in May.
Incidentally: Blue honeysuckle berries have moved from being a so-called wild fruit to a garden fruit because they are worth cultivating in a domestic garden, just like blueberries and raspberries, and more recently, serviceberries, hazelnuts, elders, cornelian cherry trees, lingonberries, sea buckthorn, rose hips and rowan berries.