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Silkworm eggs are easy to hatch and grow when you keep the process simple. Following our instructions provided on the label, anyone can be successful. For more detailed instructions of the process see our Hatching Instructions below. Eggs arrive attached to a 150mm petri dish that is extra sturdy when ordered in 250-1000 egg counts. The eggs will start off a dark purple color on arrival, and as they mature to hatching will undergo a color change to a bluish-grey color. Following the change, eggs will begin to hatch in 48hrs. We highly caution the use of incubators in this process as they are know to have temperature spikes that will kill all your eggs/silkworms. If you do use one (not recommended, our eggs hatch fine at room temperature), maintain temperatures of 78-80F.
Due to state law, we are not able to ship silkworms (bombyx mori) to the state of Hawaii.
Below we have provided a step by step instruction to hatch our silkworm eggs. We believe the simpler the better, less chance of something going wrong. With this in mind, following our directions exactly will result in a successful experience with these notoriously hard to keep insects.
Silkworms only eat mulberry leaves, and most of us do not have these trees so we also offer the artificial mulberry food made from mulberry leaves. If you have not done so already, you will need to also purchase Coastal Silkworm - Silkworm Chow which will be needed below. If using fresh mulberry leaves, you will need to follow your own procedure. We require the use of our silkworm chow to hatch our silkworm eggs.
Silkworm eggs arrive glued to a 150 mm extra strong petri dish to protect the eggs in shipping. The Petri dish is only used to hatch the eggs. So if you have any damage from shipping don't be alarmed the eggs are fine! Your silkworm eggs arrive dark purple in color as pictured, actual color can vary based on strain of silkworm type and time of year. Keep the eggs at room temperature to hatch. DO NOT USE AN INCUBATOR, HEAT PAD, HEAT LAMP, OR ANY OTHER DIRECT HEAT SOURCE. Silkworm eggs will hatch with in 20 days of arrival, often shorter in warmer months and longer in winter months. Average is 10-14 days, don't worry your eggs will hatch.
Using Coastal Silkworms - Silkworm Food you have prepared according to the instructions that came with the food it's time for the first feeding. Remove the petri dish lid, feed using a food grater lightly covering over the top of your silkworms inside the petri dish as pictured. Replace the lid, keep out of any direct sunlight and allow the silkworm larvae to feed for 48hrs. After this time you will need to remove the lid and transfer them into a grow out container. We recommend a plastic shoe box, with nothing inside dump the contents of the petri dish. Feed the silkworms again at this point with the same process above. Repeating the feeding process every 24-48hrs, DO NOT COVER THE SILKWORMS. It's important you do not cover them to avoid build up of condensation which will lead to mold and death.
After the eggs have developed, they will start to lighten in color to a gray blue color. Approximately 48hrs after they will begin to hatch, you should expect almost every eggs to hatch (90-100%). Once fully hatched, about 48 hrs after first hatching you will be ready for the next step. It's important to avoid direct sunlight and not keep them near a window. Doing so will fry the fragile larvae from the sun rays.
Silkworms can not eat dried out food, especially the newly hatched first instar. Its important you provide fresh food every 24-48hrs. After about 2 weeks you will start to pile up a mat of dried out food, frass, and silk this is normal. DO NOT OVER CLEAN, once a week is fine and only remove what is under this mound. AVOID TOUCHING THE SILKWORMS. After about 2 weeks you silkworms will start looking like those pictured, at this time you will need to change food grate size. Using the large grate size, continue the process of daily feedings and weekly cleaning. At this point the silkworms can be grown to desired size for your intended use. If growing to cocoons follow material guides as there are many different process and techequines that are to technical for this application here.