Common Disease Problems
Damping Off: This is one of the most common problems when starting plants from seed. The seedling emerges and appears healthy; then it suddenly wilts and dies for no obvious reason. Damping off is caused by a fungus that is active when there is abundant moisture and soils and air temperatures are above 68 degrees F. Typically, this indicates that the soil is too wet or contains high amounts of nitrogen fertilizer. Burpee Recommends: Keep seedlings moist but do not overwater; avoid over-fertilizing your seedlings; thin out seedlings to avoid overcrowding; make sure the plants are getting good air circulation; if you plant in containers, thoroughly wash them in soapy water and rinse in a ten per cent bleach solution after use.
Downy Mildew: Leaves turn yellow around the middle vein and the disease spreads, eventually turning grayish purple and fuzzy. Burpee Recommends: Make sure the plants have plenty of air circulation, avoid getting water of the foliage when watering, remove infected plant material.
Powdery Mildew: This fungus disease occurs on the top of the leaves in humid weather conditions. The leaves appear to have a whitish or greyish surface and may curl.Burpee Recommends: Avoid powdery mildew by providing good air circulation for the plants by good spacing and pruning. Contact your Cooperative Extension Service for fungicide recommendations.
Common Pest and Cultural Problems
Aphids: Greenish, red, black or peach colored sucking insects can spread disease as they feed on the undersides of leaves. They leave a sticky residue on foliage that attracts ants. Burpee Recommends: Introduce or attract natural predators into your garden such as lady beetles and wasps who feed on aphids. You can also wash them off with a strong spray, or use an insecticidal soap.
Flea Beetles: These small hopping beetles feed on plant foliage and may spread diseases. Burpee Recommends: Rotate crops with plants in a different plant family. Use floating row covers to prevent damage to young foliage.
Japanese Beetles: Burpee Recommends: Hand pick early in the morning into a bucket of soapy water.
Slugs: These pests leave large holes in the foliage or eat leaves entirely. They leave a slime trail, feed at night and are mostly a problem in damp weather. Burpee Recommends: Hand pick, at night if possible. You can try attracting the slugs to traps either using cornmeal or beer. For a beer trap, dig a hole in the ground and place a large cup or bowl into the hole; use something that has steep sides so that the slugs can’t crawl back out when they’re finished. Fill the bowl about ¾ of the way full with beer, and let it sit overnight. In the morning, the bowl should be full of drowned slugs that can be dumped out for the birds to eat. For a cornmeal trap, put a tablespoon or two of cornmeal in a jar and put it on its side near the plants. Slugs are attracted to the scent but they cannot digest it and it will kill them. You can also try placing a barrier around your plants of diatomaceous earth or even coffee grounds. They cannot crawl over these.
Springtails: These are small, dark colored, wingless. They do not fly, but they jump. They live in the soil and chew on the roots and leaves of seedlings. Burpee Recommends: Do not overwater plants and reduce excess organic matter in the soil.
Is borage deer resistant? Yes.
How can I use borage as a companion plant? Borage is a terrific companion plant as it tends to repel many insects and is very disease resistant. It is particularly beneficial to strawberries, cucumbers, gourds, tomatoes and cabbage.
Is borage a good pollinator plant? Yes, borage is attractive to honeybees, and also attracts predatory insects.
Can I start borage indoors? Borage develops a tap root and so is not recommended to start indoors unless you plant in fiberpots.
Can I grow borage in containers? Borage can grow into a large plant up to 3 feet tall. If you want to plant in containers make sure they are large and deep enough, and use a commercial container mix rather than garden soil.