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Garden Season Extenders

Season Extenders are wonderful tools that allow gardener's to enjoy their hobby a month or two longer, spring and fall. In the spring, gardeners are chomping at the bit to get out into the garden and plant something, anything. Getting the jump on the season, and your neighbor, is every gardener's late winter dream. In the fall, Jack Frost sometimes visits before our final crops are ready to harvest. A true gardener can't allow something like a little frost to ruin those final roses, or keep those pumpkins from ripening.

Enter the world of gardening season extenders. They can be anything from a simple piece of plastic or an old blanket thrown on the tomato plants on a frosty fall evening, to a walk-in greenhouse that allows you to start gardening a couple months before anyone else in the 'hood. Let's explore them all.........


For the serious gardener, a greenhouse is the perfect solution. They come in a huge range of styles to fit your need and budget.

Basic types are:

  • Walk-in, permanently placed- These look superb in the back yard. They are every avid gardener's dream. Permanent greenhouses have venting systems and optional heating systems, to allow you to use the greenhouse 2-3 months longer, in both spring and fall. In some areas, they can be used year round.

  • Walk-in, movable-  Growing in popularity, these portable greenhouses are less expensive than a permanent greenhouse. And, they can be folded up (or dis-assembled quickly), and stored away when not in use.

  • Hobby Greenhouse Systems- These greenhouses consist of a raised bed and a fitted, latched cover system. Your garden season begins a month or so before the last frost, and extends fall gardening. It's easy to put on or take off the cover system. They are perfect for small areas, limited budgets, and people who don't want a big walk-in greenhouse. Attractive in appearance, they scream "an avid gardener lives here" to friends and neighbors.  

  • Hoop House- A hoop house is made of PVC tubing anchored to the ground to form a half circle. Plastic sheeting is secured over the tubing and on the ends. It makes for a great temporary greenhouse, and is inexpensive. Plastic sheeting usually requires frequent replacement. It's not as attractive as other options, and is mostly used on farms.

Cold Frames:

Coldframe or cold frame

Coldframes are really popular  for a much earlier start on the season. Keep tender, young seedlings cozy warm, and provide them with more sunlight than they get indoors. The are also used to "harden off" indoor transplants".

In some areas, they are used to overwinter container bound plants and shrubs.

More on Cold Frames

Hot Kaps

hot cap or hot kap

Hot Caps, or "Hot Kaps" (also spelled: hotcap or hotkap) protect young seedlings from frost. They are quickly placed over tender annuals quickly, when frosts or cold evenings are in the forecast. Unless they have holes in the top for venting, they must be removed in the morning, before sunlight raises temperatures inside the hotcap to levels dangerous to your seedlings. While they are inexpensive, they provide protection against frost, not extended periods of freezing weather. The plants often quickly outgrow the size of the hotcaps.

Tip: Make sure hotcaps are stackable, so they can be stored in a small space for next year's use.

Frost Jacket

This group includes Frost Jackets and Wall O'Water, also called a "Garden Tepee". A Frost Jacket is part hot cap, part miniature greenhouse. Set a Frost Jacket around a plant and fill it with water. It absorbs heat from the sun during the day, and releases it at night. It can stay around the plant all season long, or be removed after the last spring frost. Because of it's heating quality, it is better than a hot cap, and can give your plants an even earlier start. It is a great way to get a jump on the season.

frost jackets

Frost Jackets are used weeks before the last spring frost.

An unexpected frost catch you off-guard? Something as simple as a large plastic drinking cup can be placed over small tomato or pepper seedling. If the plant is too big, try a five gallon bucket!


Need to protect a long row of plants from a late frost? Or, do you want to start a row of vegetables a couple weeks early? A cloche may be the answer. A cloche is a mini "Hoop House", standing one to three feet high at the center of the row. A series of tubing, usually PVC, is hooped every couple of feet along the row. Plastic sheeting is placed over the hoops. The ends are covered during cold weather, and uncovered on warm days. It offers inexpensive frost protection, and allows a few weeks' head start for your plants. It is removed as warm weather arrives.

Cloches are popular around the world for early starts of a variety of vegetables and tender annuals.

Quick Cover-ups:

When frost is in the forecast, just about anything will do for a quick cover up. The object is to cover your plants, so moisture in the air does not form on the plant's leaves and freeze as the temperatures drop to 32 degrees or below.

For covering large areas, a plastic sheet, a bed sheet, or a blanket will do. These items are lightweight, as you don't want to crush the plant's leaves. Commercially, you can buy inexpensive row covers. These items are commonly used in the fall to extend the season beyond the first killing frost. A little effort can be very "fruitful" as vegetable prices rise at local stores as soon as the first frost hits.

Tip: Light-weight cover-ups need to be anchored to keep the wind from blowing them off your plants. 



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