![]() Growing sunflowers indoors means you’ll need grow lights. If you don’t have peat pellets, regular garden pots also make great containers for starting sunflower seeds. Cover the seed with soil and water it in. Sow one seed per peat pellet or small pot. But a pot of potting soil works just as well for starting sunflower seeds. I like to use peat pellets for planting sunflower seeds indoors because there is no root disturbance when you move them out into the garden. If you plant too late, they won’t be large enough when it’s time to move the plants out into the garden. If you plant too early, they’ll be leggy and weak. From your own region’s last frost date, subtract 4 weeks that’s your target date for planting sunflower seeds indoors. Here in Pennsylvania, our last spring frost is usually around May 15th. When to plant sunflowers indoors depends on when your last spring frost occurs. Steps for planting sunflowers indoors under grow lights in early spring Peat pellets are a simple way to start sunflower seeds with no mess. Peat pellets or pots filled with potting soil.This timing involves sowing sunflower seeds indoors under grow lights and then transplanting the seedlings out into the garden when the danger of frost has passed for your growing zone. Watering and fertilizing chores are carefully managed, and you have better control over how and when the plants are eventually placed out into the garden. However, it’s probably the safest way to grow sunflowers since the young seedlings are protected from the elements and grown in a very controlled environment. Option 1 – Early Spring: When to plant sunflowers indoorsĪdmittedly, this is my least favorite time and method for planting sunflowers, simply because it requires special equipment and more attention from the gardener. Sunflowers are easy to grow from seed planted in the early spring, mid spring, or even the winter using different techniques. Let me share the ins and outs of each of these three sunflower growing options. In winter – sow seeds in plastic milk jugs outdoors using a method known as winter sowing. Mid spring – sow sunflowers outdoors, directly into the gardenģ. Early spring – sow sunflowers indoors, under grow lightsĢ. Your options for when to plant sunflowers include:ġ. ![]() Did you know that there are three different times to plant sunflowers? Each one occurs in a different location, demands a different level of effort, and requires different tools and equipment for getting the job done. If you plant them at the wrong time, the seeds could rot or they could fail to germinate. Over the years, I’ve found that knowing when to plant sunflowers can mean the difference between a large and successful show of blooms and one that’s less than ideal. ![]() Sunflower planting timesĪs a horticulturist and former cut flower farmer, I’ve grown dozens of different varieties of sunflowers. All can be started from seed by planting at one of three times. There are many different varieties of sunflowers. You’ll also find step-by-step instructions for getting the job done. ![]() This article introduces three different planting times for sunflowers and discusses the pros and cons of each method. If you’re wondering when to plant sunflowers for the greatest chance of success, you’ve come to the right place. They are quick to grow, attractive to pollinators, and downright beautiful. Sunflowers are among the most colorful and cheerful plants for gardens. ![]()
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