What's your question? Ask

Top Questions About Walnut Trees

Click on links below to jump to that question.

Questions About Walnut Trees

  • Answered by
    Nikki on
    April 2, 2011
    Certified Expert
    A.

    Sap flow does not hurt the tree. Some trees have free-flowing sap that “bleeds” after late winter or early spring pruning. Although sap flow is not injurious to trees, it may be upsetting to the homeowner. Pruning in early to midsummer, after the leaves have matured, will prevent unsightly sap flow.

    Was this answer useful?
    00
Join Us - Sign up to get all the latest gardening tips!
  • Answered by
    Heather on
    April 11, 2011
    Certified Expert
    A.

    If it is a black walnut, than no, I would not recommend planting them near the tree. But if it is another variety of walnut, this should be fine as only black walnut is allelopathic.

    Was this answer useful?
    00
  • Answered by
    Nikki on
    April 24, 2011
    Certified Expert
    A.

    Sap flow does not hurt the tree. Some trees have free-flowing sap that “bleeds” after late winter or early spring pruning. Pruning in early to midsummer, after the leaves have matured, will prevent unsightly sap flow.

    Was this answer useful?
    00
  • Answered by
    Nikki on
    April 26, 2011
    Certified Expert
    A.

    It is true if it is a black walnut tree. Black walnuts are poisonous to most plants. This article will help: https://www.gardeningknowhow.com/edible/nut-trees/black-walnut/black-walnut-compatible-plants.htm

    Was this answer useful?
    00
  • Answered by
    Heather on
    July 24, 2011
    Certified Expert
    A.

    It sounds like it may have walnut blister mite. This article will help:
    http://ceventura.ucdavis.edu/Gardening/Coastal/Veg-Fruit/PVD_Menu/Blister_Mite/

    The black fungus may be attracted to the weakened tree. There are a few kinds it could be, but they can all be treated with fungicide.

    To tell the truth, I would recommend treating the tree with neem oil. It is both a fungicide and a miticide and is safe for people and pets. Here is more information on it: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

    Was this answer useful?
    00
  • Answered by
    Nikki on
    August 17, 2011
    Certified Expert
    A.

    Most pine trees do not grow well within 50 feet of black walnut trees. If the black walnuts are closer than 50 feet to your pine trees, we recommend that you move them to a better location.

    Was this answer useful?
    00
  • Answered by
    Heather on
    November 21, 2011
    Certified Expert
    A.

    This could have happened for a few reasons.

    First, this tree has both male and female flowers. If the male flowers did not bloom well at the same time as the female flowers, then you would have reduced or even no fruiting.

    A late spring cold snap may also be to blame. The flowers are far more tender than the leaves and branches, so while the tree itself would ahve looked fine, if you got frost after the flowers opened, that would ahve killed them and then you would have no fruit.

    Another possibility is that the tree has passed its fruiting maturity. Trees, like animals, have a life span and a set amount of time it can produce. It is possible that your tree has just gotten too old to produce. But, normally, if this is the case, you would have seen a gradual decline in production over the past few years.

    Poor conditions may also have been to blame. High heat and humidity during pollination can make the pollen sticky and clump up, which makes it difficult for the pollen to get from the male flowers to the female flowers.

    Was this answer useful?
    01
1 2 3 7

Do you know a lot about gardening?
Become a GKH Gardening Expert

OK