Last week’s discussions in our horticulture community were particularly rich in practical advice and innovative ideas. Members shared their experiences with using medicinal plants like thyme and elecampane for treating dry coughs, which sparked a lively exchange of personal remedies and tips. The forum also explored the benefits of replacing traditional lawns with hedges to better withstand heat, a topic that resonated with those dealing with shifting climate conditions. Additionally, there was a detailed conversation on the need for advanced training in Vapor Pressure Deficit (VPD) and Proportional-Integral-Derivative (PID) tuning, reflecting a growing interest in precision horticulture. Finally, there was a practical discussion about handheld nitrate meters that maintain calibration, essential for efficient nutrient management.
This Week’s Hot Topics
Thyme and elecampane for dry coughs
Members are delving into herbal remedies, sharing experiences and advice on using thyme and elecampane for alleviating dry coughs. It’s a great thread if you’re interested in medicinal plants. Read more here
Hedges instead of lawn for heat
With rising temperatures, many are considering alternatives to traditional lawns. This discussion covers the benefits of using hedges to create a more resilient landscape. Read more here
Seeking advanced training in VPD and PID tuning
There’s a growing focus on precision horticulture, and this thread explores the need for advanced training in VPD and PID tuning to optimize growing conditions. Read more here
Handheld nitrate meters that hold calibration
Accurate nutrient management is crucial, and this discussion highlights the importance of handheld nitrate meters that remain calibrated. It’s a must-read for anyone managing large-scale operations. Read more here
Looking forward to another engaging week of discussions. Thanks for being part of our community.
I swapped a 25’ strip of lawn for a mixed hornbeam-rosemary hedge, and the one change that made the heat waves manageable was running a 2-line drip 12" off the sunny side and covering the root zone with 3" of arborist chips. If boxwood is your go-to, I’d skip it in 100°F spells and use viburnum instead; anyone else who tried “replacing traditional lawns with hedges” notice soil temps drop like this?
On the “replacing traditional lawns with hedges” angle, the one tweak that kept mine alive in last week’s 104°F spell was burying a soaker under 3–4" of wood chips and running it 15–20 minutes pre‑dawn on a $15 battery timer, plus a 6–8" mulch‑free collar at the stems — , learned that the hard way. For plant picks, RHS’s drought list is handy: https://www.rhs.org.uk/advice/profile?pid=3059, and thyme makes a decent living edge to cool the soil. Anyone tried a narrow windbreak row 3 ft upwind to blunt the hot breeze on new hedges?
But quick example: a removable 30% shade cloth on the west side — think sunglasses for shrubs — kept my myrtle/elaeagnus screen happy through 104°F, and I only watered pre‑dawn when a cheap probe read >90°F at 2" to ‘cool the root zone’ instead of running longer cycles. Small caveat: skip hard shearing during heat spikes; light tip‑pruning after a cooldown helps the plant keep its own shade. A creeping thyme strip at the base has also knocked down reflected heat in my setup.
A light kaolin clay spray (Surround) on the sun-facing side of my privet/oleaster hedge kept leaves from crisping during that 104°F week — a reflective sunscreen. It does leave a chalky cast, but a ~$45 bag has lasted me two summers and it washes off with a couple rains; good overview here: https://ag.umass.edu/fruit/fact-sheets/kaolin-clay. Anyone tried this on rosemary or other aromatic shrubs?