Maxikap Self-Watering Planters

Maxikap Self-Watering Planters

Maxikap Self-Watering Planters


Maxikap Planted with TomatoesThe Maxikap self-watering planter is an easy to use, low-maintenance, simple way to grow just about anything. The system is half hydro-culture and half soil, featuring a 40 L reservoir for water & nutrients with a bag of sterilied soil-less media sitting on top. Many vegetables grow extremely well in these boxes, including tomatoes, cucumbers, squash, eggplant, melons, and more. Since the boxes only need to be refilled every 1-2 weeks, many of our customers use these boxes for annual flowers at cottages or at home if they travel frequently (or if they tend to forget to water!).

Set-up Instuctions

The starter maxikap kit consists of the styrofoam box, liner, float ball, a bag of soil, and a litre of fertiliser.

Step 1 : Line the bottom half of the styrofoam box with the liner bag.

       Step 1 : Line the bottom half of the styrofoam box with the liner bag.
   Step 2

Step 2: Place the lid on the box



Step 3: Drop the float ball into the corner hole

            Step 3: Drop the float ball into the corner hole
   Step 4: Cut the bag Step 4: Place the soil bag on top. Cut the top of the bag either into 3 openings (as shown on the bag) or one large opening. Feel through the bag for 3 cylinders and cut through the bag to allow soil into them. Push soil tightly into all 3 cylinders.

Step 5: Plant a large plant (such as a tomato) into each of the cylinders.  If you are planting something with a more aggressive root system such as a cucumber, plant one on each end cylinder only and leave the middle cylinder unfilled. You can plant smaller plants such as herbs or lettuce in the surrounding soil. Do not push soil into the smaller holes, as they are for air flow.

 Step 5
   Step 6: Add water and fertiliser Step 6: Water the plants from the top once, to allow soil to settle around the roots. Fill the resevoir with water (about 40L) after adding 160ml of maxikap fertiliser. You’re done!


Fill the box about once a week during hot weather, and every two weeks during more overcast periods, or if the box has been exposed to rain (which fills the reservoir). When you add water, lift up the side of the bag which is above the hold containing the red float ball. Judge how high up the ball is sitting and add the appropriate amount of fertiliser (for example, 80ml for a half-full box).

Year-end Cleanup

At the end of the growing season, prune the remaining plant material and add it to your compost pile (assuming it is free of fungus and bugs, in which case you should discard it). Mix the maxikap soil bag into your garden beds as a soil amendment and purchase a new bag in the spring. We advise that you  do not use the bag two years in a row, especially if you are growing members of the nightshade family (such as tomatoes and eggplant), which can be prone to sharing soil-borne diseases. Some customers with several maxikaps use the bag for vegetables one season, flowers the following season, and then discard the bag at the end of the second season.



Your Cart