Collection After-Care, Yamadori

Ensuring root growth during recovery of valued Sierra Junipers

  • Goal is to hydrate through the foliar mass while few roots need time & conditions to grow..

  • Technique varies, and the tree and climate dictate environmental adjustments.

  • Gleaning best practices and journaling response for increased success.

  • Thanks to all who shared their personal technique and recommendations.

Initial set up

  • Collected: late October, mostly partly sunny and highs of 70’s.

  • Humidity tent, 100% rinsed pumice, side yard with limited direct sun light (partial shade cloth directly above foliar mass.

  • Initially using heat mats for root growth, but may hold off until temps dip at night.

  • Direct misting, then low humidifier during the day—constant 7 hrs.

Adjustments

  • Venting by unzipping flap a few inches from the bottom during the day.

  • Reduce vapor humidifier to night time only, until installing better monitoring.

  • Will install a small fan or cross breeze ventilation.

  • Monitor temp & humidity with Govee WiFi app.

  • Borrowing a UV meter for a week or so.

Bonsai Nut [Walee 2022]
  • “Potted up into 100% pumice (rinsed/sifted) in the smallest possible containers they would fit into, then wrapped the pots in a plastic bag and set them under my back porch where it only gets about 1-2 hrs of late afternoon sun. I then built a make shift humidity tent over the trees and set up three spray nozzles for misting.”

  • “Concerned with mold/mildew/rot, so I think I will plan to further reduce the [hourly misting] watering and maybe open up a bit of ventilation along the sides.”

  • “I'd really recommend Govee Wifi Humidity monitors. They're absolutely amazing for tracking moisture stats throughout the day.“

  • “I would only worry about mildew and rot if you can't provide air flow. Otherwise, I'd keep it humid and if possible, cool too. A tent can turn into an oven fast…. Even though there are few roots in there, they do need a wet-damp cycle to develop nicely. Air is very good at preventing root issues.“ [WiresGuyWires]

  • Consider covering the pumice —so that excess water can flow away freely from the bottom and the pumice doesn't drown from the heavy misting.

  • Our boy @wireme came across an unpositive idea about mist closing the stomata and not allowing transpiration, perhaps this method falls into this reasoning.

Tom Vuong collection after carry

  • At about 11:00 Tom talks about his collection aftercare for California and Utah junipers. Keep the soil from getting too wet - particularly with misters. Tom mists about 6x per night for 10 minutes each. He does not mist during the day.

  • Open yard, shade cloth. Let’s breathe during the day, mists periodically at night.

  • Cover soil so misting does not cause root rot. Waters soil ~4 days/week, not every day.

Tom Voung - Juniper collection

Season for Collecting

  • For years I have collected Utah junipers in October, with about 50% survival.... Last year I went at the end of May and all five trees I dug are growing strong. I'm a convert. [BonsaiNut, PaulH]

Michael Wei