Enter your zip code above to find your hardiness zone, plants available for your area, and your estimated ship date.
To the left, you'll find all the topics covered in this Plant Manual. Select a topic to read its information.
Huge berries with outstanding flavor. This plant produces juicy, deep purple berries that can grow to be as big as 1½" long and 1" around. They are delicious when eaten fresh and can be used to make truly outstanding jam. Heat-tolerant. Ripens in late July. Self-pollinating.
Plants grown in a greenhouse must be acclimated carefully before planting or placing them outdoors. This is especially true in hot or sunny locations. Many species should never be grown in full sun. Before purchasing a plant, learn about its sun requirements. Knowing the plants requirements can avoid any damage to the plant by incorrectly giving it the wrong conditions.
If your plant has been grown in a greenhouse, here are a few steps we recommend you follow:
These are general guide recommendations. Some plants take longer than others to acclimate.
The best way to succeed is to plan before you plant. Let’s discuss location: Do you know where you want to locate your new plant? Avoid many future problems by considering all aspects of the planting spot, such as:
Is a pollinator variety present? Cross-pollination by a different variety, of the same type of plant, is key to the success of many plants. In most cases, its absence is why the plant doesn’t bear fruit or produces poorly. Most berry plants are self-pollinating, but for a larger fruit and crop plant more than one variety.
Your plant would love a sunny place with well-drained, fertile soil. But it will be quite satisfied with six to eight hours of sunlight. Good drainage is required to keep your plant “happy.” If your soil has high clay content, use our Coco-Fiber Potting Medium or add one-third peat to the soil at planting time. We do not recommend planting in heavy, pure clay soils.
Even if your yard isn’t the most ideal location, take heart. Most berry plants are very adaptable and respond well to fertilizers, so they can get along well even where the soil is nutritionally poor. Just steer clear of sites with extremely heavy soils or very poor drainage.
Once you’ve found out about fruit growing goodness firsthand, you’ll want to expand your home orchard. It’s important to plan so that the future growth areas will be ready when you are.
Few things are as delicious as homegrown berries, and the success of your harvest begins right with the planting site and method. For maximum growth and yields later on, give your plants the best foundation possible.
Before you plant, check your soil pH. Contact your local County Extension Office for information about soil testing in your area, or purchase one of our digital meters for quick and accurate results. Ideally, boysenberries need a soil pH between 6.0-6.5. Steer clear of soils that are extremely heavy or very poorly drained.
Preparing your soil before you plant will greatly improve your plant’s performance and promote healthy, vigorous growth. It is a good idea to have your soil tested to determine if it is lacking in any essential minerals and nutrients. This can be done through your County Extension Office or with one of our digital meters.
The goal of soil preparation is to replenish vital minerals and nutrients, as well as break up and loosen any compacted soil.
Soil preparation can be done at any time that the ground is not too wet or frozen. Your trees may be planted even when temperatures are quite cool. If a hard frost is expected, it is advisable to delay planting for a while until temperatures become more moderate. Generally, as long as your soil is workable, it is fine to plant.
Your lawn can provide you with ideal organic materials such as grass clippings and shredded leaves. Not only will the grass and leaves break down to provide soil nutrients, but they will help loosen the soil as well. You can gather these in the fall with spring planting in mind.
Adding organic materials, such as our Coco-Fiber Potting Medium and compost will improve most every soil type. Organic materials bind sandy soil particles so they retain moisture and nutrients better. They also break apart clay and silt particles, so that water can infiltrate and roots can spread.
Until harvest season, boysenberries require little in the way of fertilizer. Then in late spring, begin a weekly feeding of half-strength liquid plant food just prior to berry formation. Suspend feeding when berry production stops.
Every plant has the future potential for disease and insect damage. Factors such as location and weather will play a part in which issues your plants encounters. If available, disease-resistant varieties are the best option for easy care; and for all types of plants, proper maintenance (such as watering, pruning, spraying, weeding, and cleanup) can help keep most insects and diseases at bay.
Plants appear stunted and slow growing. Leaves may be reduced in size, little or no fruit. If plant is dead, inspect roots for hard, woody tumors. Note: many things can cause stunted plants.
They are the size of a pinhead and vary in color depending on the species. Cluster on stems and under leaves, sucking plant juices. Leaves then curl, thicken, yellow and die. Produce large amounts of a liquid waste called “honeydew”. Aphid sticky residue becomes a growth media for sooty mold.
Adult is long-horned beetle. Larvae indicated by sawdust.
Enters through wounds made by insects or mechanically. Cause large brown dead areas (cankers). Often first noticed when leaves wilt and wither. Cut back to below cankers; disinfect shears between cuts with 1 part bleach and 10-part water solution. Dispose of pruning.
This disease is more common on black raspberry. Area appears reddish-brown sunken spots with purple margins and light gray centers on young shoots. Grow together into cankers. Leaves may drop early. Fruit may dry up. Over winters in lesions on old canes. Always remove and burn old fruiting canes after harvest.
Not common on red raspberry but serious on all others, especially blackberries. Underside of leaves covered with orange-yellow spores.
Appears as gray, hairy mold. Decays blossoms, green and ripening fruits and harvested fruits.
Whitish-gray powdery mold or felt-like patches on leaves and green twigs. Leaves may crinkle and cup upward. Over winters in fallen leaves.
Adult is yellow to brown sawfly beetle, 1/4” long. Larvae are brown and white, 1/8” long. Adult make slits in flower buds and larvae feed on berries.
Pinpoint size, many different colors. Found on undersides of leaves. Severe infestations have some silken webbing. Sap feeding causes bronzing of leaves.
Adult is metallic green beetle. Skeletonizes leaves. Larvae are a grub, which feeds on turf roots. This is more of a problem east of the Mississippi River.
Leaves thicken and curl much like they have aphids. Spread by insects usually from June until plants ready to cultivate. This is caused by a virus and spread partially by Raspberry Aphid, which is hard to control.
Leaves will thicken and curl, display ‘mottled’ color. There will be dark green areas and bright green areas on same leaf. Caused by a virus and spread partially by Raspberry Aphid which is hard to control.
Pruning is an important part of proper edible plant care, but many people find the task overwhelming. It doesn’t have to be! Keep these things in mind:
Spraying is important to the survival of your plants. To handle potential diseases and pests, reference the guidelines below to know what you should spray, and when you should use it.
Before you begin, read and follow all instructions on labels.
Boysenberries require an average amount of water. If you receive about an inch of rainfall every 10 days or so, your plants will be fine. If it gets really dry, you can give your new plants a good, thorough soaking with a hose. Both overhead and trickle irrigation systems are ideal for boysenberry cultivation.
Are you ready to enjoy delicious homegrown fruit? Harvest is the time to enjoy the results of your hard work. Keep a few things in consideration as you reap the fruits of your labor: the best time to pick the fruit from your tree, and how to store the fruit.
This perennial produces fruit on canes that live biennially; the plant sends up canes, the canes bear fruit in two years, and then the cane dies.
During the first year, no berries should be harvested. You may get small fruits during the first year, but starting with the second-year crop you will find the good harvesting fruit. In the second year harvest begins between July and August and the crop is hand-picked every 4 days. Berries should be picked during the morning hours as they become soft in the afternoon heat, then refrigerate them immediately. Berries are ripe when they turn a very dark red or black color and bruise easily.
Annual average yield per plant 4-8 quarts.
Boysenberries will keep about 5 days in the refrigerator. If you are not able to use the berries right away then put them on a cookie sheet in a single layer and freeze them until they are firm. Then put them in freezer bags to enjoy all year long.
Our experts will help you find the answer!
Trees that are shipped without soil to ensure good contact with soil in your yard. When shipped, they are about 3-4' tall with 3/8" or larger trunk diameter. When they mature, they will be one of three sizes*:
Matures to be about 8-10' tall and wide. Provides an abundance of full-size fruit.
Matures to be about 12-15' tall and wide. Gives maximum fruit yield per square foot.
Matures to be about 15-25' tall and 20' wide. A multi-purpose fruit and shade tree.
Top-grade, bare-root trees that give you a head start on growing. When shipped, they are about 4-5' tall with 5/8" or larger trunk diameter.
Trees in bottomless pots that allow some roots to be air pruned, so that a dense mass of productive, feeder roots can grow within the pot to make transplanting easier. Mature sizes vary. When shipped, they are about 1-2' tall.
Top-grade, potted trees chosen to give you a head start on growing. When shipped to you, they are about 3-4' tall.
*Tree sizes may vary by variety. See our Growing Guide for details.
Since 1816, Stark Bro's has promised to please customers with the very best fruit trees and landscaping products, no matter what. It's just that simple. If for any reason you are not completely satisfied with your purchase, let us know within a year of delivery and we will send you a free one-time replacement or refund your full purchase price if you don't want a replacement. To receive your replacement or refund, please call 800.325.4180. This warranty gives you specific rights, and you may also have other rights, which vary from state to state.