Drew Wilkinson manages a small scale organic farm on the North Shore of Oahu. The farm is a part of the non-profit, Positive Energetics Foundation. This week’s abundance was in the form of taro, bananas, swiss chard, and papaya.
Yogarden teamed up with Green Rows Farms to host the Yogarden Music Festival. The event was packed with all kinds of engaging activities all day long including yoga, garden workshops, and an awesome music lineup.
Drew Wilkinson held a workshop on grafting avocados and citrus trees. He guided participants through the basics from start to finish. They explored plant anatomy, the grafting process, and how to care for the plant after it’s been grafted. Some of the students were able to get hands on practice and a take home handout that helped provide the knowledge to create an abundance of food for the future.
Basics of Grafting Handout: by Drew Wilkinson
What is grafting?
Grafting is combining two or more different plants by connecting a budding end of one plant (scion) with a rootstock (mother plant) of another. A graft is made when the cambium layers of the scion and rootstock connect together and allow for the flow of nutrients and water. A callus will form over the wound and the two parts will heal together as one.
rootstock, scion , sharp grafting knife or razor blade, parafilm tape, garden tape, plastic bag, brush, tree wound sealer, pruning shears
Make sure to practice, practice, practice these cuts before using viable tissue.
Preparing Root stock- a seedling with stem about as thick as a pencil is ideal for most grafts (at least 6 weeks old.) Citrus can be grafted with each other. Lemon is a good rootstock for citrus. Mango can graft with Mango and avocado with avocado.
Selecting a scion– should be about 1 year old, same thickness as rootstock, looking for 3-5 buds near the tip, If you have a branch where the buds are already busted open into a leaf, simply cut off the top leaf and its ready to go, does not hurt plant to cut off scion, cut a few just in case, store scion in a plastic bag in refrigerator or in a box with newspaper and wet cloth-must keep them cool and out of the sun.
Different Grafting Methods:
2 types that work well for grafting avocados and citrus and are easier to perform. Side Wedge Graft and Cleft Graft
Side Wedge Graft: The main reason for using this technique is because it provides additional cambial contact. One negative effect is that cutting the scion on both sides results in a greater tendency to expose the pith, which encourages drying out of the scion. This technique is used for species with thin flexible bark where all tissue elements can be retained in the flap.
Tips on cutting scion:
-look for a flat 2-3 inch long area with no nodes.
-going to make 2 cuts: 1 about two inches at an angle and another at the end about half that.
-cut below a good viable bud
-hold knife like an x when slicing downward through scion
-don’t cut more than 1/3 way through scion
-flat side of blade down
Tips on cutting rootstock:
-find location on stock that matches thickness of stock 3-5 inches above soil
-locate a bud and start incision going about 1/3 way into the stock same length as scion cut.
-rock knife back and forth slowly.
-careful not to chip off outer layer and careful not to go all the way through.
-wrap tape from base to the top and slightly back down
-add wound sealer or wax to exposed cuts to prevent water from running into graft
-label and date your graft
-3-4 weeks out: apical dominance: option 1-prune back after 3-4 weeks about 4 inches up or right above graft- option 2: bend top over into a more horizontal position, remove dominating factors but leaves are still providing food. Remove plastic tape to allow plant to expand
-eventually completely remove root stock top
-remove leaves on the lower nodes below
-wax helps prevent scion wood from drying out and prevents rain from getting into graft
-label your graft
-Keep in shady area: Biggest concern is desiccation (drying out of the scion)
-Put a plastic bag or saran wrap over the scion.
-snip rootstock 6-8 inches from soil level
-create vertical cut in middle of stock
-cut both sides of the scion
-insert into top wedge
-wrap with tape
EXAMPLE Timeline for Grafting:
October. Plant Root stock Seeds
December. Graft Stocks and place in shade
January. Place in 50% shade outdoors and remove taped union if not using parafilm.
February. Place in open
March. Replant or transfer to larger pot
About 80 people came out to spend a relaxing Sunday at Hale Moli’i on Kualoa Ranch to swap plants & seeds. Drew Wilkinson led a workshop on plant propagation and starting seeds to send the beginning gardeners off with some extra confidence and knowledge to care for their new seeds and plants. Gabe Sachter-Smith also did a workshop on saving seeds. Live music by Jungle Rocket, Paul Izak, and Hanalei Bishop kept everyone entertained. Guest speakers included The Littlest Co-Op’s Leo Campagna, Eating in Public’s Gaye Chan, Ag Co-chair and State Representative Jessica Wooley.