Raspberries belong to a large group of fruits known as brambles, all in the plant genus Rubus. Raspberry plants require the sun to produce the most fruit. Raspberries can be grown successfully in most areas of Minnesota. They’re best pollinated by bees. Ideally, raspberries should be pruned annually; well managed raspberries will start producing fruit a year after planting. Rabbits are common pests of Raspberry, they love to eat the canes in winter. Using chicken wire as perimeter fence will help prevent rabbit damage. They have perennial roots and crowns, but their canes (branches) live for only two summers. Most raspberry plants bear fruit in summer.
Overview of Mulching Raspberries
After you’ve planted, you can mulch your raspberry plants to inhibit the growth of weed. Weeds pull moisture and nutrients away from the soil and your plants. Mulch increases the risk of wintertime damage to your plants because it delays the plants from going dormant in the fall. If you tend to have very cold temperatures early in the wintertime or very brutal winters, you may decide not to mulch at all and instead manually remove weed sprouts as they come up.
Otherwise, straw, bark, pine needles, or even rotting leaves can be used as mulch around the base of the plants. There are a variety of materials that can be used for mulching fruits and vegetables, but some materials work better for raspberry bushes than others. Grass clippings can be spread along the bottoms of the bushes, and these cuttings will decay quickly and return nutrients to the soil.
Other yard waste such as fallen leaves can be used similarly. Wood products such as sawdust, wood chips, and small cuttings can also be efficient types of mulch.
How To Mulch Raspberries
The soil around the raspberry bushes should be prepared first. The soil is loosened with a garden hoe to remove any weeds. Avoid cultivating deeper than 3 inches, because you may damage the roots of the raspberry bushes.
- Spread the mulch material over the soil. Place straw, sawdust, or wood chips over the area surrounding the raspberry bushes. Use a rake to spread out the mulch material. Aim for a depth of 3 to 4 inches for wood chips and sawdust, and put down an 8 to 10-inch layer of straw.
- Create a 1inch space between the stems of the raspberry bushes and the mulch material. Mulch placed against the stem of the plant may cause it to rot and die.
- Fertilize the raspberry bushes with ammonium nitrate. Upon decomposing, the mulch material can lower the soil’s nitrogen supply. Apply approximately 1/2 cup of ammonium nitrate per bushel of mulch material to compensate for this loss.
- Replenish the mulch annually in early spring before the growing period. Add additional mulch material to create an adequate layer.
Type of Mulch to Use for Raspberries
Raspberries are a versatile fruit that grows on bushes that can be planted for their fruit-bearing abilities and to create an attractive natural fence. Applying mulch can serve several different purposes — the right mulch can enhance soil as well as cut down on the appearance of weeds. Not all mulches are created equal, however, and some unconventional choices may work well around raspberry bushes. Mulching can help keep raspberry plants healthy.
Organic Mulches for Raspberries
Organic mulches can enhance improve soil quality as they decay. There are a variety of materials that can be used for mulching fruits and vegetables, but some materials work better for raspberry bushes than others. Grass clippings can be spread along the bottoms of the bushes, and these cuttings will decay quickly and return nutrients to the soil. Other yard waste such as fallen leaves can be used similarly. Wood products such as sawdust, wood chips, and small cuttings can also be efficient types of mulch.
Using yard waste such as grass cuttings and leaves to mulch around raspberry bushes has several benefits. Raspberry bushes bear their fruit above ground level, so unlike many fruit vegetables, the fruits will not be negatively affected when rested on a heavy pile of mulch. The covering with mulches like wood waste and grass cuttings will create a blanket over the soil surface, which will help conserve moisture from evaporating from the soil and regulating soil temperature during dry spells.
Raspberries will benefit greatly from the consistent moisture provided by mulch while other crops like vegetables might rot if exposed to the consistently moist mulch. The thorough earth covering will also prevent weeds from growing around the plants. Wood waste (wood shavings and sawdust) are free from weed or plant seeds as observed in other types of mulch, such as cereal grain crops, yard.
Do you know that Sawdust and shavings from timbers can be recycled near raspberries and used as mulch?.
Wood wastes (sawdust and wood shavings) can be used to protect root zone through the winter months and conserve moisture for better utilization by the plants. Raspberries can thrive successfully during winter through many areas, as long as they are trained close to the ground or have some sort of structural support system and shelter that protects them from the unfavorable conditions. Organic mulches like leaves and grass cuttings, as well as wood shavings, will decompose slowly over the winter months, therefore, it is usually not necessary to add more layers onto the top of the plants. With time, the mulch will disappear completely, making fresh application in the spring very important. The decomposed mulch also acts as a fertilizer, returning nutrient content to the soil and recycling it into a form usable by the bushes as they begin their growth
Precautions on Using Organic Mulch
When using yard waste like grass and fallen leaves, be sure the materials being applied to the raspberries are disease and pest free. Raspberries are susceptible to damage from insects, so making sure the mulch is from a clean source will prevent insects from being introduced through the mulch. Termites and insect eggs can hide in wood, so examining the shavings for signs of holes and infestation is very important. Leaves can also carry insect eggs and infestation, so it is important not to use leaves that have fallen prematurely or come from trees that have unusual coloration, as this can suggest a disease.
Benefits of Mulching Raspberry plants
Raspberry plants are heavy feeders and generally need to be generously fertilized. Composted manure is a good source of nutrients for raspberry plant and can be incorporated before during land preparation at a rate of 2 tonnes per hectare, to improve soil structure and provide nutrients.
The same application rate should be repeated for continuous replenishment if soil nutrient and plant nutrition on established plants. About 2 to 3-inch layer of mulch is preferred by Raspberry plants; best mulches for use in the raspberries garden include leaves, lawn clippings, and wood chips or shavings because they are usually free of weed seeds
The area around the base of raspberry plants must be kept free from weeds to prevent them from having to compete for water and nutrients. Keeping the area weeded will also reduce the potential for insect and disease infestation. Weeds should be removed early and often. A layer of mulch will help control weeds.
Placing mulches around raspberry bushes enhances the micro-climate by regulating the temperature and proper aeration of the soil and its microorganisms. Mulching has several advantages on raspberry and the soil ecosystem; it helps limit the growth of weeds, which you would otherwise have to remove yourself, and it allows you to reduce the watering frequency because mulch promotes retention of soil moisture.