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breckjensenhi

Clay Soil Drainage Issue With Newly Planted Canary Island Pine

breckjensenhi
7 years ago
last modified: 7 years ago

We planted a Canary Island Pine 4 weeks ago and are having a water drainage issue (photos of tree at end of post). Here are the details.

Location: San Diego (La Mesa), CA.

Tree: Canary Island Pine. Height about 15’ when planted. Planted on May 25th 2016 (4 weeks ago).

Issue or Concern: Water is not draining.
Background: The hole for the tree was 5-6’ wide by 3’ deep and contained mostly clay. The clay and excess tree box soil was mixed and then filled in the hole around the tree ball.

Issue Suspicion: The clay is absorbing or holding the water. And/or the hole’s clay walls are “pooling” the water.

Observation #1: As most agree, the tree looks healthy. Water drainage still a concern however.

Observation #2: To check drainage or hole water level, I use a deep drip tree stake (like a pvc pipe with holes) and insert a “dip” stick. The stick shows a water level but it drains very slowly, about 2-3” a day. It’s been 7 days since we’ve watered last and there’s still 8 inches of standing water measuring.

Suggested Solutions: The following solutions have been made.

Solution #1: Wait until the water goes all the way down, wait a few days, and then water again.

Solution #2: To improve drainage, replace soil without hurting the roots with Kellogg’s Amend and Gypsum. There was a 1 to at most 2 foot distance between the tree ball and hole wall. Not sure how much the tree roots have grown into that space in 4 weeks.

Solution #3: Please know that this is my suggestion and that I’m new to gardening. Though I am willing to do what's best for the tree, is It possible to just put gypsum on top of the soil?

Thanks

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