Although I haven’t posted anything about the hazel planting in a while, it hasn’t disappeared – in fact it is doing quite well.

Being a scientist by training, I’ve implemented a number of experiments to help me determine which practices are most beneficial in terms of improved plant survival and growth, and efficiency of labor and material use

Additives incorporated at planting –

The first one I spoke of in the establishment page: use of biochar with composted manure vs. only composted manure vs. no additives. As I described on that page the experimental design is not at all robust, but it seems the results are sufficiently different that some mention is appropriate. This year being the first major bloom season I noticed that the number of plants flowering (which is also linked to size of plant) is greater in the two areas where the amendments were added. Below is the percentage of plants flowering in the 3 treatments:

• no amendments 21/54 39%
• biochar + compost 12/13 92%
• compost 9/10 90%
• total planting 42/77 55%

Weed Barrier Use –

I used 2 foot wide heavy duty landscape fabric in two ways to help hazels compete with surrounding vegetation. The first way was to position it as close as possible to the row to the north of the east-west oriented row. The second was to make a cut perpendicular to the edge to the middle (1′) where a small circle was cut (“keyhole”). This was much more time consuming and many more earth staples were needed to secure the edges of the fabric.

Once again the flowering behavior will be used to sum up (proxy for?) the size and vigor of the plants as a result of reduction in weed competition.

• Fabric with keyholes 27/38 71%
• Fabric to north 13/24 54%
• No fabric (after 1st yr) 2/15 13%
• Total planting 42/77 55%

Conclusion: it’s worth the extra effort to make the cuts and install staples.

Individual exclosures:

In an area prone to visitation by deer plus calves and sheep on occasion, I felt it worth while to protect the plants with individual exclosures in the 2015 planting. I tried 3 types: plastic mesh + 2 bamboo stakes, chicken wire + 2 rebar stakes, and clouches (from Plants Alive) + 2 staples.

Results: the chicken wire/rebar combo was better than the other two anecdotally (no hard data). The plants too quickly outgrew the clouche and the plastic and extracting the exclosure material was difficult. The chicken wire could be used for 2 years, but was much more expensive. None of the 3 can be recommended to protect against browsing by even relatively small sheep as they can push them over rather easily – chicken wire combo presented better resistance to this than the other 2.

It did become apparent that some protection was better than no protection in terms of survival the first year. Part of this was as a deterrent to “mower blight”. One did need to lift the cages at least every other month to remove weeds/shade from within.

2-way vs. row mowing

By the time the 2018 planting was made the number of plants made creating individual exclosures cost prohibitive. I transitioned to a 6 foot perimeter fence that had 30 pound test-weight mono-filament line strung at 1 foot intervals. To exclude the sheep and calves, I also ran 2 lines of electrified wire at 10″ and 20″. I tried to keep the charge above 5KV at all times with a solar energizer. The 2018 planting was also at “final” (6′ within row) spacing so I could mow in both directions, which I did approximately weekly alternating north/south and east/west.

Results: I lost just 5 of the 95 plants installed that year and mown both directions – 3 to mower blight. Having the individuals isolated from huge clumps of weeds appears to help in survival. I haven’t done as well as intended at lifting and clearing out weeds in the ones protected by chicken wire, and when perimeter fence proved at least mostly effective, I removed the cages so mowing could eliminate weeds closer in to plants. Because of the age difference, no inferences can be made, but I figured folks might be interested in the 2 methods, plus the mono-filament usage.

I’ll try to get an update on nut production when the season arrives. The appearance of flowers on a majority of the 2015 plants was very encouraging.