Posted by: Cassey Anderson CSU Extension Horticulture Agent, Adams County.
April is the month when many gardeners are really getting things going. Perhaps you’ve planted some peas or kale in the vegetable garden already, perhaps you’re just getting things underway. Regardless April is a busy month. You can plant your cool season crops: radish, spinach, lettuce, green onions etc. You can start warm season crops indoors: cucumbers, melons, squash, pumpkins etc.
|Example of bolting lettuce from |
What is the difference
between a warm season crop and a cool season crop? Mostly it’s in the
temperatures they’re willing to tolerate, and those that they will grow well in. Cool season crops can tolerate cold temperatures, and some can even tolerate light freezes (defined as anything between 28 F and 32 F). These crops are also typically done with their season by the time we really warm up in July. Many of these crops have produced their final fruit or bolted, i.e. gone to seed, once daytime temperatures go up into the high 80s or 90s. If you didn't get your fix for cool season crops by the time summer heat hits, you can always replant for a fall harvest. Typically replanting can happen around mid to late July depending on crop maturity dates.
|Photo by Cassey Anderson|
You can get your perennial garden going as well: asparagus, rhubarb etc. are good to get started in mid- to late-April. Perennial crops may take a few years to get their feet under them before harvest, but you can subsequently enjoy even decades of low-effort production.
Do not harvest for the first 1-3 years (sooner for crowns, longer for seeds), or until you begin to see numerous spears poking up. In the first year you should harvest for about two weeks and let the remaining spears turn into ferns that will feed back into the plant overall. In subsequent years you can harvest for 4-6 weeks, usually into mid-June or early July.
If you have specific questions be sure to reach out to your local county Extension office.
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