Seed counts per pound

Seed counts per pound

When mixing seed, it is important to know that different grass seeds have different sizes. A Kentucky Bluegrass seed for example is about 10 time smaller than a Tall Fescue seed. By law, all bags of seed must have a label attached detailing – among other things – the percentage of each type of seed inside the bag by weight. This means that a cool season mix with “a little KBG” (10%) and “a lot of fescue” (90%)  is actually a 50/50 mix by seed count.

If you are shopping for seed or planning to mix your own, the below table should come in handy.

Grass Type Seeds per pound
Kentucky Bluegrass 2,200,000
Tall Fescue 230,000
Annual Ryegrass 230,000
Perennial Ryegrass 230,000
Common Bermuda 1,750,000
Centipede 410,000
Zoysia 1,000,000
Tank mixing order

Tank mixing order

20lknapsack1It is not uncommon for multiple pesticides and fertilizers to be mixed together in the same sprayer tank so they can all be applied in one go. Most pesticides labels provide information on compatibility with other pesticides and fertilizers, but testing of all combinations is impossible. If a substance is not specifically mentioned as compatible, follow the label to perform a compatibility test.

To minimize the risk of active ingredients of different formulations interacting with each other, the following mixing order should be used, from first to last:

  1. Wettable Powders (WP or W)  –  finely ground solids, typically mineral clays, to which an active ingredient is sorbed. They provide an effective way to apply an active ingredient in a water spray that is not readily soluble in water. These dry preparations look like dust, contain a high percent active ingredient (usually 50 percent or more) and are mixed with water for application. Wettable powders form a suspension rather than true solution when added to water. Good agitation (mixing) is needed in the spray tank to maintain the suspension.
  2. Dispersible Granules (WDG)  – manufactured in the same way as wettable powders except that the powder is aggregated into granular particles. They are mixed with water and applied in a spray exactly like a wettable powder. This dry formulation usually contains 70 to 90 percent active ingredient.
  3. Flowable or Aqueous Suspension (F, L or AS)  – very finely ground solid material suspended in a liquid. Liquid flowables usually contain a high concentration (4 pounds or more) of active ingredient and are mixed with water for application.
  4. Emulsifiable Concentrate (E or EC)  – usually contains the active ingredient, one or more petroleum solvents, and an emulsifier that allows the formulation to be mixed with water.  These concentrates are soluble in oil and form an emulsion in water. The emulsion-forming characteristic results from the addition of adjuvants to the herbicide formulation.
  5. Solutions

When using a sprayer:

  • Calibrate the sprayer
  • Read the herbicide label and wear personal protection equipment
  • Fill the tank half way with water, never mix concentrated chemicals in an empty tank
  • Measure chemicals you are adding to the tank.
  • Apply the pesticide according to label directions.
Orbit 4 zone watering system review

Orbit 4 zone watering system review

61uosjyvil-_sl1000_As those of us without an irrigation system know all too well, keeping seed moist during a seeding project with hoses and sprinklers can be challenging, especially if the area is large. The Orbit 4 zone watering system aims to make the process easier by automating the task of watering for up to 4 zones. Since the standard hose bib doesn’t have enough water pressure to run more than one sprinkler, the controller turns on each of the zones one at a time.  But how does it perform in the real world?

The system consists of a battery powered controller (2 x AA), a 4 port manifold and 2 valves. The system can control up to 4 valves, but only 2 are provided in the box.  Two additional valves can be purchased separately if needed. The setup process is straightforward: attach the valves to the manifold, connect the valves to the controller, insert batteries and, after a 3o second period in which the controller tests each valve, the system is ready to be programmed.

The Orbit controller supports up to 3 start times, and each start time can be configured to activate between 1 and 4 valves. The valves are activated sequentially from 1 to 4, with only one valve open at any given time. Turning the programming dial to the “How Long” section allows you to configure how long each zone will be watered – this setting applies globally to all starting times configured. Finally turning the dial to “How Often” allow you to select on what days the program will be activated – either by selecting  between 1 and 7  days of the week or by selecting the every 1 day option. Once configured, setting the dial to Auto will instruct the controller to turn on and off based on the configuration entered.

Having used the controller for two weeks to water ~6,500 square feet of lawn during fall renovation, I have found it to be a huge time saver. I have configured all 4 zones to turn on at 9:00AM, 12:00PM and 3:00PM watering each zone for 30 minutes. So far, it has worked flawlessly. The valves feel sturdy and open/close with a loud thump, with no leaking. At the same time, this system has a few annoyances which unnecessarily cripple what could be a fantastic product.

The Pros

  • Sturdy construction.
  • Works flawlessly.
  • Good battery life  – no sign of batteries needing to be changed after 2 weeks of continuous use.
  • Huge time saver for keeping areas moist during seeding.
  • Manual cycles can be initiated with the push of a button.
  • Clear on-screen indication of how long until the next starting time and how much longer left of the current watering cycle.

The Cons

  • Only comes with 2 valves. Additional valves have to be purchased
  • Only 3 configurable starting times. This can be made to work, especially since a manual cycle can be started anytime with the push of a button , but having up to 7 starting times would have been more suitable for the light frequent watering needed during seeding.
  • The electronic controller features a bracket in the back which allows it to mount onto one of the valves. The bracket is too loose and the controller just falls off, making this mounting system somewhat useless.
  • The clock consistently falls behind by about 2 minutes each day. Not a huge deal, unless you need to synchronize starting time with another device like say a pump.

Overall, the Orbit 4-zone watering system has proved to be a huge time and labor saver and has helped me achieve more even germination with far less effort than in previous years. It is a must-have for anyone considering a renovation project without an irrigation system.